Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa56074bd7de0ccd…

MALICIOUS

PDF

85.2 KB Created: 2021-08-18 00:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c561f4e326309ff721a23f4eaaf61e4a SHA-1: c16493952341e6bbd7ccfce8e427a8e02f462d3e SHA-256: fa56074bd7de0ccdadac9df0c6812c96b135775758d64a22744e5897e4fb8cce
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is a link farm designed for SEO manipulation, likely to distribute malware or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://bogelaipigeon.com/upload/file/25833233353.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/b6c2f4e6ae13ffcddfb15c1e6113c99f/kavatibubokok.pdf
    • http://yuanyoujie.vip/userfiles/file/nikewol.pdf
    • http://massvt.sk/editor_uploads/system/files/ziseweruxo.pdf
    • http://tvcsoltau.de/userfiles/file/lepukuzilupige.pdf
    • http://szpk.hu/_user/file/24107895519.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160721ca58446a---69811268860.pdf
    • https://truckforceone.com/upload/editor/file/91881716888.pdf
    • http://aarogyamedico.com/userfiles/file/97347389634.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/717121fae0c66faf2be64d6522f7a7f2/faberelikomeri.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/9a6fb085e44cd23992da33997a520789/koluxelidotu.pdf
    • http://ahkjt.com/upfile/file/dabixafigilako.pdf
    • https://florerialafloresta.com/ckfinder/userfiles/files/jepiwobume.pdf
    • http://chinoboxingclub.com/clients/36032/File/febixupotu.pdf
    • http://palami.by/images/file/17397750562.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/640ead9fab82761dce969e47db82a742/27241197294.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5e8739d923d2a28e7d01af59d74c45d5/janatewowukamuzojuli.pdf
    • https://fulzugaskozpont.hu/files/wevasuf.pdf
    • http://tomei4x4.jp/js/upload/files/kuxujalosemiri.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/a8215cc939f44786ecdfd325e169f3c1/luserajatematul.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/adf7f9994c2078c8982a7e0f1d5eac11/soduxovogixatavugukebe.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/5f3c637bee8f4f92a958187069d8e6b5/31396026646.pdf
    • http://schnauzermountainminiatures.com/clients/17729/File/sixubokezinosafokufere.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=logic+pro+x+10.2+crack+for+windows+%2B+mac+full+free+download
    • 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_off0000e461.bin
ad8eb88a5b861ed9784f16adb69310b8bfd6d72e87f3441af09238d352eb6664
pdf-font-stream PDF embedded font (sfnt) at offset 0xE461 16872 bytes
font_01_sfnt_off000110ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x110AB 16792 bytes
font_02_sfnt_off000128c2.bin
8a69b18d4b208455d830c7ee64651ad5e51d857a21dfec52f5687e4adbcfae10
pdf-font-stream PDF embedded font (sfnt) at offset 0x128C2 11560 bytes