Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a2371926194e41…

MALICIOUS

PDF

105.8 KB Created: 2021-07-25 16:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3993ab3227b2af44ba2c8010aaf28d20 SHA-1: d8d04ab1b32fa293b0a4a12985b0ae185d14f078 SHA-256: 59a2371926194e41c80fc68c1e007f9e8ec3a47636f28700e359bfe6e16b2596
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links likely serve as lures for phishing attacks or to distribute further malware. The document body is heavily obfuscated and unreadable, providing no direct user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae353350709---selolomotovaminokape.pdf In PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/117d14bb127933eafc0da0d89bbd834d/88900762470.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/43824791015.pdfIn PDF document text
    • http://fittbikese.hu/files/file/tobidurerinazit.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/fa16f0216e671f418a937dffbe1b4e4b/jogemabenaxozi.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160903d1bbda51---95367156849.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/ludamezuvoxakugofi.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff7da4ec87---71226163855.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/89034983339.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608724d8d4177---4898689020.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3ac28b5ccb---jelib.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/busefiluwimekikowoluroted.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/0ohobc9bq0c3e2bf864fap8lnu/24444816404.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210702_8650615562EFA397.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/3534841311.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/60089692913.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608332384c051---xagajizi.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b6c18cffa---21812721770.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/82578387348.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0a684555b---73180864631.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/10372477931.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/v7cn616h5vaib4mf2egr3cf3je/90181589385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=which+original+trilogy+character+am+iPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DA 18228 bytes
SHA-256: d386dc63ee987d8036d2d0015ac3a8f47653a840d3a62ed6f68743d1b4801c41
font_01_sfnt_off000168bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000180d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180D4 10616 bytes
SHA-256: e904c1823f3ac3c68364cc4d476477852d9a8f53594433e9876906ec1c8f327c

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