Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2bec8feb704fec…

MALICIOUS

PDF

92.7 KB Created: 2021-03-15 17:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bf7909bfa8ca37dce4a0aabc134b7c83 SHA-1: 22cd575baa88973529dc9da820941e84173a445a SHA-256: 1d2bec8feb704fec786802ff3f7ba3c1e819aff45276d0cea84f2fbf72e7010b
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dugedepap.ru/aws?utm_term=attack+on+titan+2+final+battle+nintendo+switch+game PDF link annotation
    • http://winoorama.site/revupafijubqd15x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386620/normal_60471d89a8b65.pdfIn PDF document text
    • http://dozawudefe.iblogger.org/pabuxudazorosefuvepupoxa.pdfIn PDF document text
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/mewaxugejelip.pdfIn PDF document text
    • https://negedawitadunez.weebly.com/uploads/1/3/4/5/134587096/25bf02bccc59b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5ff034338ef8d.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/dieFEab/wurutegegizisipunewitobog.pdfIn PDF document text
    • https://pepusaneped.weebly.com/uploads/1/3/4/5/134503703/xawuxan_tifawamike.pdfIn PDF document text
    • http://lixeveveke.iblogger.org/the_confessions_of_st_augustine_book_3_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_6012fc29ce1fb.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/bgiidgc/ringtone_maker_apk_mod.pdfIn PDF document text
    • http://adanakebap.org/chander_pahar_novel68teg.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/jjyhij2/speed_boats_for_sale_columbus_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/bgdheib/85078463480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_600eed0795ad7.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/1426431.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/7hbUqjb/44831419119.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_8e5070a79f814d40a2d3e0f1d57f0117.pdf?index=trueIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_a727a6ae375b473597c2d2e8a17a2b78.pdf?index=trueIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_22493717205543a5b63ee6d9f6e983ee.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_off00012829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12829 5756 bytes
SHA-256: bab6677a23772edd1231e077bef1ccf7aa1e239df19c6a05be69b04c67a52bb8
font_01_sfnt_off00013bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBD 12180 bytes
SHA-256: fe1803978dc95cfff394764e39672c1b8c957f8adf54b466a20659d797d039a4