Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed5297cca2df271…

MALICIOUS

PDF

131.4 KB Created: 2021-03-24 21:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 552df1be9642f7421c4300fe2d2dd38b SHA-1: c1502820cb3b085c19a5eac6139e10353455ba06 SHA-256: 9ed5297cca2df271cf9ccedc8cf6784c1568a9cc0a29e3f5ae044d547ca92a28
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9997

Heuristics 5

  • 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 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://midufefew.ru/wix?keyword=towelroot+v3+apk+xda PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490735/normal_6043ed904b694.pdfIn PDF document text
    • http://moderivapotilos.22web.org/maxasome.pdfIn PDF document text
    • http://wolotalute.iblogger.org/what_skills_do_you_need_for_public_relations.pdfIn PDF document text
    • https://sitiguzesamow.weebly.com/uploads/1/3/4/4/134401829/1343705.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485443/normal_5ffe0d56108aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484995/normal_60148efa964f7.pdfIn PDF document text
    • http://rajonilelubej.22web.org/35719858215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412761/normal_5fcb4a0735016.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/c1fb7dbbf4206.pdfIn PDF document text
    • https://fegopamaxu.weebly.com/uploads/1/3/4/8/134896151/5966174.pdfIn PDF document text
    • https://jumirugefof.weebly.com/uploads/1/3/3/9/133997886/4ad70e5ccc8ac.pdfIn PDF document text
    • http://zuferiwabofeg.22web.org/ncert_chemistry_book_class_12_part_2_solutions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470209/normal_6047a34a48c04.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvezijejek.epizy.com/kadagatibiwiwesawofojab.pdfIn PDF document text
    • http://wepiliga.epizy.com/curriculum_vitae_template_european_format.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/how_long_do_dunkirk_boilers_last.pdfIn PDF document text
    • http://winixugerefubu.epizy.com/can_i_download_minecraft_windows_10_for_free_if_i_have_java.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/semikowazabolikevuru.pdfIn PDF document text
    • http://mapelapelebiben.rf.gd/mudujara.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B736 1568 bytes
SHA-256: ba55e6ccaf2d11196a899e3cf5198406c3c6dfdd5bd9935e3edec120af147f75
font_01_sfnt_off0001bf0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF0A 5172 bytes
SHA-256: 9648167259a0058d069523f99f4786269e0710febe9a6550ed0c41f0782a9c6c
font_02_sfnt_off0001d0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0CC 14184 bytes
SHA-256: b57e2dfe3101fa6d8433972ef9fa48de3573ddde8e97eebd2104f23632a7d18a

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