Malicious PDF — malware analysis report

Static analysis result for SHA-256 070248251f3f98cd…

MALICIOUS

PDF

142.1 KB Created: 2021-07-18 17:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6b5cc5f6f8cb04bdfb28cf46feba5ea5 SHA-1: f1318082481f424d0276e4852ad7e2609c7c1bd3 SHA-256: 070248251f3f98cd46b5c77f673254d3dc86ee72992b2b6c59b628b5b432273b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The file contains a link farm pointing to multiple compromised WordPress sites, which in turn host other PDF files. This suggests a phishing campaign designed to lure users into downloading further malicious content. The presence of multiple distinct hosts and links indicates an attempt to distribute the malicious payload widely.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee08adcae33---bulewisajozamukotedafad.pdf In PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/6ec35981e439bee12c6a8b982c375a4d/lifojuvategoletojajesumat.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021062122031744.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/46447718624.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5bf4f861a0---39101781940.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608395a92cdaa---xerixozunesupawosonat.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/709f095e6cee3701efbe1d2b62a8c9ca/taruzudefizolokadudawif.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d26368e95ed---63420805629.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cf88d8c18ee---tubosadofanivixesisinev.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/961fea309b8d0e2ca2de8da39968ba83/musokomujutapabobowuwuzu.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf1fe21919---44851062123.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/devumesugizabapolunumuj.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210623204914157.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/4ca7bc7f520fb5b601fe0352ae9a5d7f/74060363073.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609846e430f62---88116682955.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb78fee8f6---3227412758.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f41b0fc29---40854493473.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4cf13934b863af8d7333773f2b521f29/32709596507.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/17161721251.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/fbdb4580fa69ddf25fa5c0e14577dd7d/povokoj.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/72285662401.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=morpheus+is+this+realPDF 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_off0001cd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD14 10340 bytes
SHA-256: d3493709aeded68b449918d3c16176ec10fef32ec54baf698788444aea28f0ad
font_01_sfnt_off0001e490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E490 17920 bytes
SHA-256: 4401922746ace86557bf1e9db338624ed085d26cd92a27c1c8cfd3edc465eca5
font_02_sfnt_off00021301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21301 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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