Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba200b8c87c970ff…

MALICIOUS

PDF

74.8 KB Created: 2021-04-23 07:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 463c4f96d76ea399cf9d303745d76344 SHA-1: 861cc8ca0b2e97ec37ba4360cd5909118f1b8f32 SHA-256: ba200b8c87c970ff76cb6a0369d91f6283c430e78312831d0b0901890562e91d
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://crophysi.ru/strik?utm_term=dyson+dc16+handheld+vacuum+cleaner+replacement+battery PDF link annotation
    • https://cdn.sqhk.co/wepurodapike/gfgijc4/nofigomubasepo.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/Elzjbjf/islanders_vs_lightning_2020_playoffs.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/8356052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444648/normal_5fe2991f8a33d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528915/normal_603b615b286f6.pdfIn PDF document text
    • https://tizusetupo.weebly.com/uploads/1/3/1/6/131607013/5678241.pdfIn PDF document text
    • https://cdn.sqhk.co/midusuworab/jgheidM/tuzoxipunerukesepatete.pdfIn PDF document text
    • https://cdn.sqhk.co/sugigevapure/MhiUjch/vasefumimirijukatawonuxij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448357/normal_6040539471d36.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/cYjj6jg/17338172625.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/dheAWjc/english_vowels_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/ihjfGig/collectible_card_places_near_me.pdfIn PDF document text
    • https://lonawojalokofa.weebly.com/uploads/1/3/1/3/131382346/f8dd373ba051204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_60485e9b4c9e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482002/normal_5fcad6cb81e21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417988/normal_605658771b6c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/15773036851.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/78726253400.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_off0000e4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 5820 bytes
SHA-256: dc8bb19b627291e25fd2033293a01c0a97a5272f9017243489599c90cec40b19
font_01_sfnt_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 10684 bytes
SHA-256: 84279ea52c6301c0972d2aec1351ee4a1945a9c07223223da1cd0c83983b29aa

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