Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6272c1e518a8d7b…

MALICIOUS

PDF

87.8 KB Created: 2021-07-04 09:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 25a85194125033147a0bd5eb380c7164 SHA-1: 4833682d8edee71f068275ee4fe987b293c76333 SHA-256: a6272c1e518a8d7bffd8ee251c5a1161f1d8f5db328e3435b617fe28320b27d5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/bq46ppe703o1gj8fdg14e76g71/7978973451.pdf In PDF document text
    • https://kingdomofgodmn.org/userfiles/files/fizip.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/pelim.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/mexebivawim.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/b1f0ea2612ce212940d59c3d0a91cdba/bivemetubufajinizasedib.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafb2ea8782---mewinozuwa.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/0f7ec3604fc18497fee0d6cb0933549c/vigikewolodowoluralapuv.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/ptmuafcojoqq7g4un2cucpokle/volifefol.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f21461a0b6---3363034415.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/73c23bbc45a12c417dc3fa557d39e784/retegil.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/c982985171151b0de1cd30cf5abbda3e/biretavufugujomogubigila.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609855fa2fd2b---14766836222.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/35028760084.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/faloxivexonulog.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/190a238844e45d70259be3d38bfdc1b5/dizenumef.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608d40f60b0bd---38824739640.pdfIn PDF document text
    • https://capecoralliving.com/media/file/17561759352.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/34fb4e9361b65604ea830ec236296da6/95630409463.pdfIn PDF document text
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/kinagapizuvarusimadexem.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/nejiwaxepowofufi.pdfIn PDF document text
    • http://allycatering.com/userfiles/80141833520.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/47572160305.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c970098661a---balirumewu.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070806ab6e00---55007980589.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085ca8d9454b---rumaweg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=my+pee+smell+is+really+strongPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62E 10704 bytes
SHA-256: dab5f0fbb5d24116a49551cc0466790c82f60948a6a7ead8f4a9e44c4abef02e
font_01_sfnt_off00010eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB6 16692 bytes
SHA-256: fa06fa3a6b9a76bf48fee99305e3091f77dd55b9a95339ca165d5880c956ae47
font_02_sfnt_off000139c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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