Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a37b74a8657843…

MALICIOUS

PDF

80.1 KB Created: 2021-03-13 19:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8094e2496c893297cd47e325406b24a SHA-1: d45c40a9378404c9b69d6c39fde6219fccaa97f5 SHA-256: 42a37b74a8657843d3073c5bf991a25a8ce50e72c154d886f50e0e552f68c906
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating it hosts numerous external links. One of these links, 'https://seumenha.ru/wix?keyword=how+to+get+gum+off+glasses+lens', is presented as the document's content, suggesting a deceptive lure. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', reinforcing its malicious nature. The presence of external links and the phishing detection suggest the document is designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=how+to+get+gum+off+glasses+lens
    • http://fitdieta.com/alita_2_moviex4fmg.pdf
    • http://rankingcoach-apps.com/microsoft_flight_simulator_xbox_one_release_date8gx0r.pdf
    • http://lovelyhouse.online/aircare_humidifier_cleaning_instructionsftzc8.pdf
    • http://fitokaps.xyz/dowoxidebueawcv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_605bf7dfea03499a8d4078f569de7424.pdf?index=true
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_8ee8bc826f6649b68d7f0399c36a2a12.pdf?index=true
    • https://s3.amazonaws.com/pipaneku/livro_de_malaquias_hernandes_dias_lopes.pdf
    • https://s3.amazonaws.com/tufitijinexu/tubiben.pdf
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_f9b939b4aeef4744acd941859ca03059.pdf?index=true
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_4015251110ee4343ac186b0d0ded4920.pdf?index=true
    • https://s3.amazonaws.com/kujapomib/cavitron_plus_gen-_131_manual.pdf
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_41c69148397a492c91fe7758212fbe69.pdf?index=true
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_d0edfd890c6744b5b7228083a909b6a7.pdf?index=true
    • https://s3.amazonaws.com/xofalepelala/sefisazarofawuberesipe.pdf
    • https://s3.amazonaws.com/wumodukubaru/illaoi_aram_guide.pdf
    • https://s3.amazonaws.com/rurovikejigibu/43212176706.pdf
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_9b9c9ecaefa042d5a6d284615ba73429.pdf?index=true
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_d6194e2fcd6746c8a2ed8da3bd863e35.pdf?index=true
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_36cb553efe76435fa4a17eef15e5b974.pdf?index=true
    • https://s3.amazonaws.com/fevobelijogal/63119171215.pdf
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_cd912f723bab46e192cc1fda0f47e128.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb95.bin
ff9c5dd6dd413a39238cab2d45403d4d0bd0c16d1d268951814131f48f345821		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB95 5044 bytes
font_01_sfnt_off00010cc5.bin
df0c8049ba2dac2e7f5d2e9192657cb21b56c6528041d3b86687471f0f245d1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC5 11664 bytes

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