Malicious PDF — malware analysis report

Static analysis result for SHA-256 e034f0abcdd353c0…

MALICIOUS

PDF

87.7 KB Created: 2021-05-21 23:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 24afe80d7622f21f41fed9d395f5ad10 SHA-1: 9b3ef7bef4eae73b6312506babfd341dddd84439 SHA-256: e034f0abcdd353c096bc5e21d3071081e0295a05b1fb2ca1e09ebc7ca4fb0831
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The presence of a 'download button' lure and the ML classifier's high confidence score suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attack pattern designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/strik?utm_term=how+many+ar+points+is+diary+of+a+wimpy+kid PDF link annotation
    • https://tasoxagizuj.weebly.com/uploads/1/3/4/7/134734804/8554efe90c1bea8.pdfIn PDF document text
    • https://zujamabosav.weebly.com/uploads/1/3/4/3/134363941/jadajivibef.pdfIn PDF document text
    • https://mijolepeworid.weebly.com/uploads/1/3/5/3/135394353/7972069.pdfIn PDF document text
    • https://turabevov.weebly.com/uploads/1/3/0/9/130968962/pevapirijamu.pdfIn PDF document text
    • https://bivojivowuru.weebly.com/uploads/1/3/4/7/134726538/xivopisamudeki.pdfIn PDF document text
    • https://nakaporona.weebly.com/uploads/1/3/1/4/131438848/pigox.pdfIn PDF document text
    • https://wemoloxemud.weebly.com/uploads/1/3/4/6/134603697/22128e75d6.pdfIn PDF document text
    • https://dajusokododolin.weebly.com/uploads/1/3/5/9/135964726/a5c3e8f16e2e.pdfIn PDF document text
    • https://dilaxala.weebly.com/uploads/1/3/4/8/134865885/gidodov.pdfIn PDF document text
    • https://punafatig.weebly.com/uploads/1/3/1/4/131408139/4696772.pdfIn PDF document text
    • https://sokexeziboril.weebly.com/uploads/1/3/4/9/134902232/mopatedase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f239605a-0e0b-4a7f-b5f1-75093f83af3d/gymnasticbodies_foundation_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abe465c-672e-4143-a2fb-6ce6bd1b23d3/27225424151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70993b1e-a8b2-46dd-b878-bc532d3dbf13/gimemetaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97339ba3-aecc-4ded-8e99-8a96e1f4eb39/19178703141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1648cd7-e45f-44a2-8a3f-a3e21db52606/62742538964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98b5b30-4bdd-4838-b8bb-ce291e39e5e0/97409669077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5d1088-306a-4f91-b7f4-276e1e2f5640/can_could_may_might_must_should_ought_to.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f07b40f3-40d1-4c6d-9e08-eefbab9be456/best_brain_training_apps_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0c2824c-ddee-4543-911f-1a38ca8f3738/conversations_with_god_book_2_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede60c22-eb20-4dc9-824e-17e3480640ce/citizen_eco_drive_radio_controlled_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd504b10-812f-4474-8907-d0a0fec0ce0c/danobabituliji.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11622 5376 bytes
SHA-256: 8ede51e6958b44780064fe7e6defe0eb04a6100e77a354e2b74614d2e2b83c16
font_01_sfnt_off00012867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12867 12196 bytes
SHA-256: 01e05416ea294a1b63dab94a93686ec1a290757b921ac78e8aac93acf4dd4098

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