Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd127a73cb20a9cf…

MALICIOUS

PDF

89.5 KB Created: 2021-07-07 03:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9a25a9f6a68d5049a1bef24e9ecc17ca SHA-1: 64f272916c1466187e6fa1f3e98e206f90b1e10c SHA-256: fd127a73cb20a9cfb8b524432a96f2d206bf09472a11e9bd752434892b02e322
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of embedded URLs pointing to compromised WordPress sites and disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of numerous external links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=hltwhs004+assessment+answers PDF link annotation
    • http://interface-referencement.com/userfiles/file/pepefuxuwotexidomisab.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/de394c3a4b213a7350a071ca38db1f55/48381197251.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/filekavibara.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607364d19091c---54882829965.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/9v0sdsouu4getipq7k30oe7496/70725101768.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32d1cb626---wamevoligikifubafi.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/32684822120.pdfIn PDF document text
    • http://chsjackets75.com/clients/a/ae/ae1e0d6431e3080ad3d3eb1024a27f31/File/37695274031.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/631bf9d068a1e118b06b63cb723e3b15/zapewijenanama.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a108d78cc3---83179509924.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/46917167032.pdfIn PDF document text
    • http://akssert.com/userfiles/files/69142245111.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d3e2b30d890da5360eb1f04f106e69d5/ditisakitasevim.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/gagine.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/90843169247.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/37719778421.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b64b5122837---83764816460.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/nupuxuxuwe.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/j6meov0r106slgdnq9gv92k6fq/gatibu.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d555f4e0d5c---12049404953.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/25749452396.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/sinadaroxosavapiruzegud.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/77815708665.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FD 10436 bytes
SHA-256: 0f3bde08fc0bbfedc253b4455fccdedf2e76a3a0437df216f7278733579b3d6e
font_02_sfnt_off00012e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E88 16332 bytes
SHA-256: c4b8bff6cd830bd699fbd6b478b10302b7e642a81992413bf5e49628783833bb

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