Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb6aa8d4cac0976…

MALICIOUS

PDF

76.1 KB Created: 2021-03-07 19:39:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7d062b063da1ab6b1f224f3ae2efac15 SHA-1: 3c5993f4b46913b104180f6fed2538cf5c270f92 SHA-256: abb6aa8d4cac0976ade1bf5f9d9017bb1b10302012071380322b3715fe120214
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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-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.
  • 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://gimoguvi.ru/wix?keyword=what+kind+of+countries+have+a+traditional+economy PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368479/normal_5ff9ff613987b.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/jdigQZz/bavufod.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/djejanv/auto_theft_gangster_apk_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450636/normal_5fe52f7373227.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/04645d8a-b269-4f3b-838d-2fa53d5ae811/88188427945.pdfIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_7ad157cac8384e8292127bef4ca6ed25.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1125d0-a250-407f-9c89-cf339ca3854c/virisetoviwajogugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1c24d8f-91eb-439e-a7f0-867709fc043a/jalizivigotazerujofezote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e02eab3-5042-4512-bffa-35b94e1ac554/what_is_the_best_topic_for_quantitative_research.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_ab48d6e27dbf4efdb86d854d0e238a17.pdf?index=trueIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_0e03912c5fdc475d910adfb0dc964ad2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f6dd3dd-fbe3-4694-be4c-e4504d0ebb4f/96627228286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b862e8b2-5dde-431d-83c5-c4841899fbbf/summary_of_the_plague_by_albert_camus_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f13a5b-3b51-4bd4-bd13-cea7ef87fb42/dotufatovobisofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d4474d-a958-4c67-acaa-2c9e38ba70e2/nomozajimal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9186f47-7ab8-4952-86cf-fa8e1a95cdd5/wooden_log_table_top.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68c7cfb-7118-4bc6-8c13-a89596e37cbb/taco_bell_burrito_supreme_no_meat_calories.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_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 5500 bytes
SHA-256: 8be5845f3e6e21bec4e618aa886f2a3f5e5a0242a81b6d0d7e5bd9e1d99feac7
font_01_sfnt_off00010142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10142 9984 bytes
SHA-256: 4f0ad9f9ee6ef330fc4b2363c27c118c6fa04f8bbc1232c444c83b93b76a83a2

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