Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab8cd26e1dd5640…

MALICIOUS

PDF

75.5 KB Created: 2021-03-10 09:09:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a5df9a782714d2e49969bbc5dde545c3 SHA-1: d6165cd9b4534189b74216471a89078cf27f56ab SHA-256: 8ab8cd26e1dd56409f223d97e69539e2db84c381b0750c4e609a634563792e48
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URLs designed to redirect users to potentially harmful content. The presence of multiple external links, some utilizing UTM parameters, suggests an attempt to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/aws?utm_term=osi+model+layers+vs+tcp+ip PDF link annotation
    • https://cdn.sqhk.co/vojazodelud/jhZYghC/21938996176.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/jhjchjY/98436002479.pdfIn PDF document text
    • http://kigetipopizatij.getenjoyment.net/hp_laserjet_pro_m1212nf_multifunction_printer_driver_download.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/how_long_do_you_cook_jerky_in_a_smoker.pdfIn PDF document text
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/9825809.pdfIn PDF document text
    • http://dotenipago.medianewsonline.com/netolon.pdfIn PDF document text
    • http://finofubamu.mygamesonline.org/87340545468.pdfIn PDF document text
    • https://dubakaxejevam.weebly.com/uploads/1/3/2/6/132696109/3032357.pdfIn PDF document text
    • http://vibijinit.scienceontheweb.net/94106665096.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/bOhM0jq/52468668316.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_543c0d97f2184c88a817b2271ad2e444.pdf?index=trueIn PDF document text
    • http://fugodijuw.rf.gd/83793189440.pdfIn PDF document text
    • http://datadeb.epizy.com/call_of_duty_apk_data_offline.pdfIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_f215db6955ad44e1a0910ee446cbab47.pdf?index=trueIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_8cd310efb5754417ae3a9aa9a56f77c6.pdf?index=trueIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_22ba29be803745cf98c52849fdf68349.pdf?index=trueIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_51558aa8e12045568177d20d32585401.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_2d317d269fa04864809ac4620e3b2354.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_3aac56cd48094b88ba1eb1bbe359a622.pdf?index=trueIn 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_off0000eb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 5408 bytes
SHA-256: 86f156ced282a6d5348e8e58cf7bbaffb7cbe52899c0074270884481b584a4b8
font_01_sfnt_off0000fdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 10380 bytes
SHA-256: 74a7bf59b4b2b5564614cb162c1a3e22a54a2a994cd4796a0a67b60505ba7bd7

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