Malicious PDF — malware analysis report

Static analysis result for SHA-256 068ec51c595b7dc2…

MALICIOUS

PDF

66.9 KB Created: 2020-11-21 03:08:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f0e542d1cf1c5f417b715971c1d910b2 SHA-1: daa769ce05df11319947bfb847a1e02a87d26795 SHA-256: 068ec51c595b7dc24d6ea1636e52f4cc0fd0e07378833988c68f28af254ee90a
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 0.9998

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://trafffi.ru/123?utm_term=candy+crush+soda+saga+cheats+unlimited+moves PDF link annotation
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/komorid.pdfIn PDF document text
    • https://mulodunewumil.weebly.com/uploads/1/3/4/3/134314444/203728.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/tezofasaganezasaxosi.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/sabivalus_juzigaf_kuxufareme.pdfIn PDF document text
    • https://moxetutatag.weebly.com/uploads/1/3/4/2/134234950/xejuwiti-dikuv.pdfIn PDF document text
    • https://dolilifiwu.weebly.com/uploads/1/3/4/4/134401054/9533119.pdfIn PDF document text
    • https://kakakirikixego.weebly.com/uploads/1/3/4/3/134318951/2d4fa57.pdfIn PDF document text
    • https://xijanejomasug.weebly.com/uploads/1/3/4/5/134506458/3286544.pdfIn PDF document text
    • https://ruxikejogotiwo.weebly.com/uploads/1/3/4/5/134576655/93fc41171df9cef.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/e73c0a1c-9b67-4a4e-97b2-57842c77b177/1380170014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0711f5f-4946-4346-82af-66f15a56695e/tawaxujuxuzotasene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/907df4a6-6581-4e01-9b15-bd5db121f018/33218885512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23355539-9d41-42f4-a44f-50ad7b577226/50672780790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af645ab3-da3f-4066-9296-239c132c6a1f/anlise_estrutural_aslam_kassimali_d.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_off0000c85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85C 5420 bytes
SHA-256: 7bc27db35335366aba3035cf800cc178fa522bb969ea6117e6b5b640fd4e748c
font_01_sfnt_off0000daac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAC 10752 bytes
SHA-256: 0b9fa48e92c534037540619be1fdd91a7067dfdb09ee325dacd6f79c6f46dfc0

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