Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc48f345bcd2382…

MALICIOUS

PDF

80.0 KB Created: 2021-04-06 23:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4f606fb2bae3858d1816854c6b1e7cdc SHA-1: 232781cc6eac75c7680bd0989439c060f75b1571 SHA-256: fdc48f345bcd23827987e56a58c021d0514f3c47fab6e9e355c9ab058ca1d7fc
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to disposable domains, indicative of a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded links are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/award?keyword=bhagavad+gita+pdf+in+gujarati PDF link annotation
    • http://lusolakidareve.mywebcommunity.org/zumobogux.pdfIn PDF document text
    • https://mifanupomiseri.weebly.com/uploads/1/3/2/6/132681757/5658327.pdfIn PDF document text
    • https://doxuxipineza.weebly.com/uploads/1/3/0/7/130740192/3370412.pdfIn PDF document text
    • https://zadujemerumid.weebly.com/uploads/1/3/2/6/132695269/zedidutin-neritopog-dutelivixusifan-tidepegitoputap.pdfIn PDF document text
    • http://fobexugelego.getenjoyment.net/basics_of_mobile_communication.pdfIn PDF document text
    • http://xomofaki.getenjoyment.net/65525364138.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/34a7dd07326d336.pdfIn PDF document text
    • https://lidimegofomizut.weebly.com/uploads/1/3/1/3/131380930/9421822.pdfIn PDF document text
    • https://malafusid.weebly.com/uploads/1/3/2/8/132815748/1d331dcf9ea2e7b.pdfIn PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/ed9daa518c44ce1.pdfIn PDF document text
    • https://xovirekines.weebly.com/uploads/1/3/4/6/134648888/32cc825f3dd7c.pdfIn PDF document text
    • http://kiramosowufotir.22web.org/what_is_the_story_of_twilight.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/417f468f-e2ae-45db-8363-fc8dd80aa657/presentation_zen_slides.pdfIn PDF document text
    • http://jajoditad.rf.gd/napekiterofoduje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb3af2d-8b31-402e-999a-770f435116a9/29467742208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbb0763-4f1a-4048-b4f9-b5bd127757cb/39588809414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3fb70f0-3d36-4743-b73b-ed27830fc03f/vatel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc829eb-cb85-40cb-8e5f-d60a69bb53c7/navy_and_marine_corps_commendation_medal_citation_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa6a67d-9bbb-4b5a-a340-f0ffe577e7aa/3d_metal_printing_seminar_ppt.pdfIn PDF document text
    • http://mizozibobekujul.rf.gd/93552191396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21795432-0261-44d1-867e-38e1ef7dfbeb/51875015858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f1569b2-a35a-48a8-910d-5b403ba74d4f/72446282438.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED47 4932 bytes
SHA-256: 0bda85aad7a36bce19999a2062a7579ce4718a8375266379bcee2349d773143b
font_01_sfnt_off0000fe0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0D 10888 bytes
SHA-256: a631b7643b872dfeabf7924f4e02bbc41c28fd8dd4f644efec7989cf9c090c22
font_02_sfnt_off000122ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122ED 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378