Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90d38863b74415c…

MALICIOUS

PDF

87.1 KB Created: 2021-01-20 07:09:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 95dfceb70e981e50ea96caa444652244 SHA-1: 77802e5d94c28944ab9545dbd79aa47e8a400b6e SHA-256: d90d38863b74415c8d70506f47ce0f5488ebd50e67bb4c53b5c143313475faf2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to manipulate search engine results or distribute further malware. The presence of embedded URLs further supports this, pointing to external resources that could host malicious payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/123?utm_term=norwegian+wood+murakami+analysis PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476147/normal_60068e06e3f9a.pdfIn PDF document text
    • https://zaluzukefajol.weebly.com/uploads/1/3/5/4/135400247/nebij.pdfIn PDF document text
    • https://giligigava.weebly.com/uploads/1/3/4/4/134494785/sokitebuf.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxemetakol/lYJWghp/save_the_planet_organizations.pdfIn PDF document text
    • https://jedijevabepepox.weebly.com/uploads/1/3/0/7/130739982/9253263.pdfIn PDF document text
    • https://xuzomavarek.weebly.com/uploads/1/3/1/3/131383242/b117fc64.pdfIn PDF document text
    • https://cdn.sqhk.co/dozirolizilu/ibRwihs/yellowstone_cast_season_2_episode_4.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/gecicjh/63079253249.pdfIn PDF document text
    • https://cdn.sqhk.co/xanikadir/GZjbhiE/boxakemafabikolerafazexur.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/jhfPha3/jodimibap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f920ed0c3207.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/geiaSja/electricity_bill_check_haryana_dhbvn.pdfIn PDF document text
    • https://cdn.sqhk.co/zobunifi/7gilgf6/jenopolokijusasuril.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/bQxkbha/sugiverokomiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404987/normal_5ff54587e820a.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/pokorevalaxex/45419863697.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/jazajemebu.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/analyse_swot_dfinition.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/ccdc_2ma.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/eternium_bounty_hunter_havoc_build.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/nipejilal.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/employment_offer_acceptance_letter_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BF 10892 bytes
SHA-256: 7574622f8ba76ab27858a71e001a48b29707d92568bece91fa7aa0844dbe62d7
font_01_sfnt_off000115ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BA 5372 bytes
SHA-256: 7aa64b3e3b80d8fb116328e253b1e70f493ee14eaaa2143c48f0b331ac2934df
font_02_sfnt_off0001280d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280D 10744 bytes
SHA-256: 2067678ed7d7374551a5ae612dd6e72139bb3261fd650c371a328ea677e67d1c

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