Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa288635f786d2e…

MALICIOUS

PDF

72.8 KB Created: 2021-07-08 06:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 956e42b55d8556d18a3d07c637ada9c4 SHA-1: eb952cee5d97ab0a232ea9b9e10d57bf121fbbe5 SHA-256: 7aa288635f786d2e72f1e703fc16f1a31fe397833c42278771940089097f34ed
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by numerous heuristic firings related to external URLs and compromised CMS uploads. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of multiple links to potentially malicious domains points towards an attempt to redirect users to harmful content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://irlanc.ru/uplcv?utm_term=can+you+convert+a+pdf+file+to+a+word+document PDF link annotation
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/qds7bjesms1dm19fk7du2gogb3/siguz.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a83d400fa32---pedepepus.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/tisimoveniwefamuk.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/89844693776.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/fljk4odb03fp3t7oqbvfb4inqv/78844345034.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6987bd464---vaketonegusemuf.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/sapuw.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/nmp7pcf9n05h4d5m4kvla16vd1/kidebebofutepisuxe.pdfIn PDF document text
    • http://planbmedia.hufiles/vowekolow.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/293acdfe96489b8cf2238fa6182ff2f2/pisagidaweda.pdfIn PDF document text
    • http://splogservice.ru/content/files/49372828205.pdfIn PDF document text
    • https://kede.org/userfiles/file/zabemedes.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/afd0ff305f2907d70382ac51bf031c1d/93020308226.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/5cf2916cd0e2538874414f644ca48b1d/85231082090.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ff79bc0d9.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cc0d17b7a---gebaraverizikojog.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eff31437dc---rewijejizofuleditas.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a8dbe4e39---vixekabewodeb.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/19266501492.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/tapep.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/3515237021.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/25889620983.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/zoxaziserixeribufa.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fec2f67d85---83663456768.pdfIn PDF document text
    • 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_off0000bc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC46 11012 bytes
SHA-256: 0adbbb3eeb9eb93fc8ec68508084ce135448b60179ecc360c6d16bdbec63c769
font_01_sfnt_off0000d5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EC 15588 bytes
SHA-256: 0cb45789d84c7c2cfa792a288e49c4a8be89c37ec0202a3bc31dcaa736095e76
font_02_sfnt_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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