Malicious PDF — malware analysis report

Static analysis result for SHA-256 0677f9ef13819b6f…

MALICIOUS

PDF

116.8 KB Created: 2021-07-19 17:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f89382fd3b39585bab482b2cba103ef0 SHA-1: b2554687cd3c29e266398efd9885ac6f97220270 SHA-256: 0677f9ef13819b6fe0cbd51c2415666d244ecd868db34464d3c89ed1f152781a
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is unreadable, but the heuristic findings confirm the presence of numerous external links, some of which are hosted on disposable domains or compromised CMS uploads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/ecdfdd1d7b206f4087d0b5d444f04f7d/wugamojekawetazobiver.pdf In PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160773c2d2c81e---11987121884.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/lovavuwukunasuzupo.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/favuvenidinamutibeje.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/fukubokali.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/fogapunipirexazowemudo.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608121152080c---xalutupizatumiwotoj.pdfIn PDF document text
    • https://smallislandcurry.com/wp-content/plugins/super-forms/uploads/php/files/c04f5f1de8a175c63303eec275685f38/83680663890.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/mixina.pdfIn PDF document text
    • http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/pagaruxuvobonapemupu.pdfIn PDF document text
    • http://hermangroupcorp.com/clients/3/38/389628ddbd62db2fa1e4299ecdfc1861/File/dejepugenajedura.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/b28s8o30q2015n58608b9qqaf5/lolazikumoxizasiv.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/1791521659.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c144b0349a4---vumag.pdfIn PDF document text
    • http://446888.top/userfiles/file/garulujes.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/c3sf5ru1ql5os1snrbv9nushu2/napenopopopiv.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/cad0d387d783afefb5f91ce8c5a6a9dc/82246264453.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/vfi5iht49qdsao39g48fdqq8sl/434180634.pdfIn PDF document text
    • https://maviet.vn/upload/files/vibodemoxunaxumozobonukuz.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a075cdb1975---41946627825.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/4talh3lvjks8kh7983nr90p902/bedolexopedej.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/cb6bb3561dabc19585c5758848620544/26946120615.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076167a0a7e0---vagiretavebu.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788d5d6d629---66139011818.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/lulimujojalojiwobileruxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=pledge+meaning+tagalogPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001491a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491A 17988 bytes
SHA-256: 91998f55276c11bb328ffff360fad913eb3e3d66d5c357902877ca5992d4e9f7
font_01_sfnt_off00017840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17840 18108 bytes
SHA-256: 0ae58f35dad927ee5c8e7f73537acb544401ccafe188ca76655a09e418677504
font_02_sfnt_off0001949e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1949E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001acb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACB5 10324 bytes
SHA-256: 299604175a1348fab25d517fd01affb97ff33c53ed1e292dbfdc0f472f5c43c4

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