Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a28a7a1ed2b027c…

MALICIOUS

PDF

68.4 KB Created: 2020-12-20 12:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d0d192b3d3296b479db217bd58f839f3 SHA-1: d05c6da2ec458d952bb46f9ec5c3730766ff2dbc SHA-256: 5a28a7a1ed2b027c984663e6e10c98299de24c418eaf06afacd7e95c94989ad5
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high-confidence ML classification. The document body, though heavily obfuscated, appears to contain metadata related to a game, but the primary malicious function is the embedding of numerous external links. These links likely serve to direct users to phishing sites or other malicious content, a common tactic for distributing malware or conducting scams.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/strik?utm_term=divinity+original+sin+enhanced+edition+tips+reddit In PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/1845397.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/4224387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5fb3534b1a283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_5f95b51dbefc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451350/normal_5fc7cb284c53f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411270/normal_5fa17b109b3ca.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/lezepasidixabazafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5fd356f94ee58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_5fb92bc2680ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f919af99b0f1.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/bisazabe/autobiography_of_a_yogi_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/new_android_phones_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/zepalitojoritojisurenojab.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/jofes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcb8173599a867de449200/t/5fdcd30d42e81c390ad3d486/1608307470513/hall_ticket_tnpsc.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/19832291792.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5875b239b072291509c32/t/5fc6f09a93ad1a48120df007/1606873249118/wix_fuel_filters_any_good.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_off0000ce11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE11 5496 bytes
SHA-256: 2f31d687384fd8b125cbee8f0d4c98eca823d1c5c5d6c50497e3160495c8e0f3
font_01_sfnt_off0000e0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D2 10380 bytes
SHA-256: 3c77db37c595fe641c9276433cdda206ba7e348213d3a0439883fa79627f02a3

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