Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2b96fb7eae1831…

MALICIOUS

PDF

75.8 KB Created: 2021-06-09 03:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bddeb45a21ba3f4d2c68431c03946f0 SHA-1: cf7d0fe6a65943dae78d681f659a735f1b6ced5d SHA-256: cd2b96fb7eae18311abb8c9304da9abe6b4a016cfc9733075323dd0d13c80417
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for link farms and phishing sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one prominent example being 'https://tazegeravi.weebly.com/uploads/1/3/5/3/135390309/likaxa.pdf'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/pbw?utm_term=ts+convert+to+mp4
    • https://tazegeravi.weebly.com/uploads/1/3/5/3/135390309/likaxa.pdf
    • https://static.s123-cdn-static.com/uploads/4417325/normal_5ffda6ee5d3be.pdf
    • https://cdn-cms.f-static.net/uploads/4379854/normal_6052b22196da9.pdf
    • https://cdn-cms.f-static.net/uploads/4401525/normal_60bc5a33d8328.pdf
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/rajadurex.pdf
    • https://bukemabo.weebly.com/uploads/1/3/4/6/134653237/jasom.pdf
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/5963108c0.pdf
    • https://gilukuxuzi.weebly.com/uploads/1/3/4/4/134494221/8466552.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/4a7bb38f-ae63-42aa-a9ea-1d0b75862d24/magpul_remington_700_stock_weight.pdf
    • https://uploads.strikinglycdn.com/files/938b95b9-7505-4f6a-92d7-5021bf5d28f8/truck_simulator_pro_2_apkobb_free_download.pdf
    • https://uploads.strikinglycdn.com/files/96d54e06-14d6-4b7b-9378-6da1a1c760bc/92337186967.pdf
    • https://uploads.strikinglycdn.com/files/f6bd2efb-34b9-4877-9187-fb81b4967e64/tuxubogigalegorosabipivi.pdf
    • https://uploads.strikinglycdn.com/files/357fe01c-cdd2-4dae-b74c-af08ad5ccbe7/68840664086.pdf
    • https://uploads.strikinglycdn.com/files/8406fc2f-879b-4eb3-b99d-4210e305d7d7/como_llenar_carta_poder_para_tramite_vehicular.pdf
    • https://uploads.strikinglycdn.com/files/0baf36bf-5512-419a-bb36-da9f70615ba5/sadlier_vocabulary_workshop_level_f_unit_4_synonyms.pdf
    • https://uploads.strikinglycdn.com/files/abd66b50-45f7-43f8-8376-14e924d1a764/41511491841.pdf
    • https://uploads.strikinglycdn.com/files/69516a41-e87e-4e58-9248-edaceb414399/golds_gym_treadmill_airstride_plus.pdf
    • https://uploads.strikinglycdn.com/files/2c0b3130-508f-441e-9bb5-d364228af815/2498955076.pdf
    • https://uploads.strikinglycdn.com/files/6b092d2b-b610-4484-8c5e-d59f8dded36e/what_is_an_api_510_inspector.pdf
    • https://uploads.strikinglycdn.com/files/347f2351-b24b-4d6f-ac7b-d5b683ea97ff/another_word_for_boat_ride.pdf
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e291.bin
6e9a19a36a8bbfa3add2273b4801f0062d6994db2973f904c533b89e349928e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE291 4676 bytes
font_01_sfnt_off0000f24f.bin
977fd8fad920a12304d78f8a3d4f5ad361c6fb78df79991474d886ca2b93eacf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 9828 bytes
font_02_sfnt_off00011412.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11412 4324 bytes

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