Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ccce0312e5996fe…

MALICIOUS

PDF

80.5 KB Created: 2021-04-24 22:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 929dfc55617844976fc3692c79f0995b SHA-1: 9e45638f8f52df2fd542cc71f5aed8904dee52b9 SHA-256: 8ccce0312e5996fe7c742f0851e8d89bfdc0c3cb7975c46c39b942c709af00a3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though partially garbled, suggests a lure related to dream interpretation, likely intended to trick users into clicking a malicious link. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=que+significa+so%25C3%25B1ar+con+que+se+te+caen+los+dientes PDF link annotation
    • http://loveworld.club/common_noun_worksheets_for_class_5v7ekh.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/gihdBgj/35376349175.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirijobadi/KjhN1ji/vimuv.pdfIn PDF document text
    • http://esparks.ru/is_usps_accepting_international_maillrbq0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450501/normal_5fec195e02c9f.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/fisugurotavaxu5mh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fc930d635319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465006/normal_600dd191bc701.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/cjdVtYv/fugotavewogik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5fd79e67e1413.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxibila/haRgjhb/delivery_tip_tracker_free.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
    • http://niserikotul.rf.gd/fujopazu.pdfIn PDF document text
    • https://d45de9d9-8116-4232-9203-1b9506c390e4.filesusr.com/ugd/a69a10_083a26533bdd482896f1ee80c4d82b00.pdf?index=trueIn PDF document text
    • http://xevivalekivo.epizy.com/coleman_mobile_home_furnace_filter_size.pdfIn PDF document text
    • https://331e17ce-4321-42a7-89aa-067eaa3daeeb.filesusr.com/ugd/6576ad_f690ded4d1264b459dab451a434275ba.pdf?index=trueIn PDF document text
    • http://tinosizifaxuful.epizy.com/72323186506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d9294d-56cb-4aa7-86ab-007ef1b5db05/bawodasoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39970309-9ef0-415f-87d0-eff3f17b85eb/ti_83_plus_graphing_calculator_online_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10bb7662-dc94-4c31-92ea-4bff389eddf9/dutupewo.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_49eca1c286cd48e79e39e9afd020d333.pdf?index=trueIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_f5cbc1eebadb4bf4a14882ba519dd09c.pdf?index=trueIn PDF document text
    • http://xawezukazekexi.epizy.com/31199900576.pdfIn PDF document text
    • https://c4fca8c4-0f54-45c3-ae88-320069d86c16.filesusr.com/ugd/ac0d21_a0305762dc2b43eeb11e7da593e4d1df.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBF 5468 bytes
SHA-256: 4537dbbe2067b06acbe69f9e9568db61aff61a40990e86e1d2477508779574fc
font_01_sfnt_off0000ff1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1B 11252 bytes
SHA-256: b7f90cec9bba5c893623e42b4e619429c1df939daf75c34d2ced8445f2dd64be
font_02_sfnt_off000123ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176