Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d0aecf4172c94d…

MALICIOUS

PDF

70.8 KB Created: 2021-02-18 01:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: eab6c4fc82ab4c5dcedb710267e7e000 SHA-1: 5a46b7b0bdf6c63dddb623f064f28025632ca62b SHA-256: 86d0aecf4172c94d21f4e88bd35ddda214611fe79ab7f89f9b7d00889d9e6fb6
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a significant number of external links. The presence of a PDF link farm suggests an attempt to manipulate search engine results or direct users to malicious content. No scripts were extracted, but the PDF structure itself facilitates the attack by hosting numerous URLs.

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 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://jottigo.ru/strik?utm_term=the+gravity+between+us+book+pdf+download PDF link annotation
    • https://felixitu.weebly.com/uploads/1/3/4/0/134012625/a79524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_5fd6c39c52bba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448096/normal_5ffd0a65e75f7.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/winax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453563/normal_60093f6dcb081.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407664/normal_5fe545c43e8cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503692/normal_5fff5f3946295.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/SjxjirR/22896751103.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/gjlPdhg/77076444925.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379610/normal_5fcdd5edbabbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412758/normal_5ffd187f74f3c.pdfIn PDF document text
    • https://cdn.sqhk.co/foseziwate/jdhaskc/kafekadira.pdfIn PDF document text
    • https://cdn.sqhk.co/pixukinoma/adafLQG/krabat_full_movie_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450502/normal_5ffbb21be02f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5fdae18e85944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423155/normal_5fd7b6613f47e.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
    • https://s3.amazonaws.com/xijilesuzuxo/pebozerejurugojerizebibow.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/78524238066.pdfIn PDF document text
    • https://sites.google.com/site/noxiousdate655nsd1/read-online-the-doctor-is-in-dr-ruth-on-love-life-aIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC63 5592 bytes
SHA-256: a5a58dc16a5b17fb25687fcd26f5feccadd463cd5849d4639aba76fce56caa91
font_01_sfnt_off0000cf76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF76 2304 bytes
SHA-256: 82128ed8b3943756312bb2aa3fa3ca9b420899eb8cf783a40f2c050768bae5a5
font_02_sfnt_off0000d967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD967 11140 bytes
SHA-256: e9f1944333724feadea000f936f1844f4c4b2c2642c3adf26270c64cb5239b92
font_03_sfnt_off0000ff61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF61 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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