Malicious PDF — malware analysis report

Static analysis result for SHA-256 40424a1dc3c36ba1…

MALICIOUS

PDF

128.3 KB Created: 2021-03-23 06:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7f37e2f4087b7dee756edde9b00cf697 SHA-1: 792ba4d114c9df19fd59c08d2a1d162b34528d4a SHA-256: 40424a1dc3c36ba106f86f5bdb10a56942c94f29b44a370ae4248fee5db05c59
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 designed to redirect users to potentially malicious sites. The primary lure appears to be "Software development life cycle pdf", which is likely a pretext for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://botokaw.ru/strik?utm_term=software+development+life+cycle+pdf PDF link annotation
    • https://cdn.sqhk.co/disonixures/jfhjhjd/vimogupupilafoveloremapa.pdfIn PDF document text
    • https://kezidixujaroko.weebly.com/uploads/1/3/4/0/134040737/livufuxatiborag_govetixu.pdfIn PDF document text
    • https://marezovunit.weebly.com/uploads/1/3/4/7/134719427/semipibeju_bebeworir_lajupitape.pdfIn PDF document text
    • https://wozijosetat.weebly.com/uploads/1/3/1/4/131407158/36d3e2746b7e1f6.pdfIn PDF document text
    • https://cdn.sqhk.co/vanatuwo/Jjbp7ds/20129661050.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/T3YhebH/softball_questions_for_interviewing.pdfIn PDF document text
    • https://bimifubonag.weebly.com/uploads/1/3/4/8/134881536/vixeve.pdfIn PDF document text
    • https://seladimara.weebly.com/uploads/1/3/4/4/134460986/gowetifez_lezuzak_rijavubidi_zepusumogawo.pdfIn PDF document text
    • https://zezazuzomej.weebly.com/uploads/1/3/1/0/131070861/wefoka.pdfIn PDF document text
    • https://gufofusubovara.weebly.com/uploads/1/3/5/3/135323195/nemomowomot_fewimasidefe_zitutavomuneti_gitelimij.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/cGgef1g/52950659052.pdfIn PDF document text
    • https://risuwawew.weebly.com/uploads/1/3/4/4/134403416/db8896b3b.pdfIn PDF document text
    • https://cdn.sqhk.co/karapenakozi/jibUIhe/the_maze_runner_movies_explained.pdfIn PDF document text
    • https://zisugopijelides.weebly.com/uploads/1/3/1/4/131438068/7779132.pdfIn PDF document text
    • https://gph.is/1lus4LpTheIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_ebe68ecdba1149b2b4a41a4b2ef4f42d.pdf?index=trueIn PDF document text
    • https://89511c73-251b-4bee-a1a5-5f4bd4863124.filesusr.com/ugd/f24cb8_fd7909b49ca04199883f7a438c815dc9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a5fc9a-d433-4dda-9d88-cd3e629c628c/danby_8_000_btu_portable_air_conditioner_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14c1278-dbf4-4cc2-8280-80b6ceb52246/bewiruginadolisevavudu.pdfIn PDF document text
    • https://a819be37-316e-4347-83bc-b067fb6953c8.filesusr.com/ugd/d5662a_4ee5d9af86304d3e9f21b246224aa142.pdf?index=trueIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_7aa888009cb0450fb5841d016ecf955f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/72690ae0-c579-4df6-b073-506a37cadd53/31628367295.pdfIn PDF document text
    • https://245df057-3761-468b-8bc4-2c9c6734f7c7.filesusr.com/ugd/06c8e1_4bc8c54930434be39239fe03b0121882.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/838f9a01-78c5-4c11-ba6b-91a4f2d91bcf/52088727984.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000196b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196B5 5268 bytes
SHA-256: 407a992683c31f36a965c7464f89220fc6b1673c957de9adc93d5766b6a89dcb
font_01_sfnt_off0001a89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A89C 11192 bytes
SHA-256: 92623ae97f0b174e690d0cd662cdb0dd46d69824309adc6d264f17ae7d0547fc
font_02_sfnt_off0001ceeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEEB 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_03_sfnt_off0001e41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E41B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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