Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae75b658edfc196…

MALICIOUS

PDF

71.1 KB Created: 2021-02-20 15:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0a36abd67d594f88314c0eb4ee7ad578 SHA-1: b86ddf990f60b0cd43481a6abb58d3de9f0041b0 SHA-256: 8ae75b658edfc19696005cef47185918ae699c0cbf9aab39903c5fb0b1bcd258
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. One of the embedded URIs, 'https://maypoin.ru/wix?keyword=aleko+ac1400+gate+opener+troubleshooting', appears to be a lure for users searching for specific technical information, likely to redirect them to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://maypoin.ru/wix?keyword=aleko+ac1400+gate+opener+troubleshooting PDF link annotation
    • https://cdn.sqhk.co/jirudumom/gfgiPif/cheats_for_sims_4_pc_make_happy.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/diiVieR/noah_maze_method.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/gPjehay/retro_city_rampage_dx_3ds_update.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/Z5jd59N/41708012691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499972/normal_601209510bf00.pdfIn PDF document text
    • https://pegojuzifaxoda.weebly.com/uploads/1/3/5/3/135309499/66b291f0516.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498345/normal_5fddf4e7d1104.pdfIn PDF document text
    • https://bumovewadenol.weebly.com/uploads/1/3/5/3/135318567/e0f7cbc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410953/normal_5fe0c6341a67e.pdfIn PDF document text
    • https://nozirurabi.weebly.com/uploads/1/3/0/7/130738896/6617826.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426810/normal_5fc5ed312163e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486053/normal_6005d31a05c29.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/zeputipeva.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/sazixipame/castellar_bold_font.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/aov_guide_zephys.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/medical_certificate_for_students_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/30765903295.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/40179984131.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_off0000d92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92F 5668 bytes
SHA-256: c12b0f806934a028841b3a026f85c6ec9a7a5d5d47d4b3481d2d02fba9404686
font_01_sfnt_off0000ec82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC82 10076 bytes
SHA-256: f629dca727f38b6dc6b08952e3d8f2ea770893cfd029d23a277600429c7b9c9b

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