Malicious PDF — malware analysis report

Static analysis result for SHA-256 c120a54375d387e4…

MALICIOUS

PDF

73.9 KB Created: 2021-07-07 03:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14cc85828054e63fa35ace31efaf4db5 SHA-1: b19565e7d34c4a48c4b8a0a7837c75b44a244a93 SHA-256: c120a54375d387e494a6400393bbc4a3324f215c55d4e319eb5307c7bfbd6b32
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload directories. The document body is heavily obfuscated, preventing analysis of its direct content, but the presence of numerous external links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://triangle-electronics.com/assets/userfiles/file/28138244802.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a04140425fb---fobamezu.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/p2h25fmvkvk6tt8fms6i4cq6kr/tamikinosirivejevo.pdf
    • https://cihangirhotel.com/upload/ckfinder/files/durim.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2daf01458---25917337124.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/2510d9efe34fcdb6232c81ba5efc9e65/90228158327.pdf
    • http://adbuffalony.com/uploads/files/56909586845.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/39b95b9e600c638aee482e44c3b79f4d/vokiladuxuvez.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ab1d1dbb7---dafunorivelurajeze.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d34acf9d199---61593603016.pdf
    • http://oprfhs70.com/clients/879438/File/kipizoparakizikoruxarone.pdf
    • http://www.tobywells.org/media/fckdir/file/69175534276.pdf
    • http://diacritic.org/travel/app/webroot/img/files/65811452564.pdf
    • https://vandolderskb.com/images/usr/75442814809.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a01b695c3ae---9009259440.pdf
    • https://bandai-k.com/userfiles/file/2611544794.pdf
    • http://ahcxdq.com/uploads/file/160955123089.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/537c14da7612989d7c5f8d1cdf929b67/mukabesota.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/67379890e0b3f42af9760bb7c05267b1/barozujuzixasaxob.pdf
    • http://hpworld.hu/data/pic/Image/file/85748599852.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/2mahl1n88mcp8tr78hrgq6nfuo/ridemaresomepitujiluzamu.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acc5a71678---xituxijiviwodamunovebek.pdf
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/gazikotow.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=combustion+of+c6h12o6
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be46.bin
d6c030f6279b18d12b5993930e1b24ae47ca8da18c7cf12c655b8aa64c25ca11
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE46 16640 bytes
font_01_sfnt_off0000e9cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CC 16792 bytes
font_02_sfnt_off000101e3.bin
341155997246f88dfa78c472bb7fca5cbc4e9cfe8a0bd812f1044656e3a9dc30
pdf-font-stream PDF embedded font (sfnt) at offset 0x101E3 10772 bytes