Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2c17e6bca80089…

MALICIOUS

PDF

70.4 KB Created: 2021-03-02 07:26:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ce4ac44387f7f519207bc58be9653e9c SHA-1: ee32b5424fc8296e9f0fec3b7c6b3704b57f6c13 SHA-256: 5a2c17e6bca80089fc81c3e86527b92933a0162cf40b961bc7e59d89060df3b6
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to drive traffic to potentially malicious sites. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection point towards a phishing or malware distribution campaign.

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://crophysi.ru/strik?utm_term=when+worlds+collide+meme In PDF document text
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/jatosa.pdfIn PDF document text
    • https://zelelifejoba.weebly.com/uploads/1/3/4/3/134321633/norutabev.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/cZl05jc/commander_in_chief_demi_lovato_chords.pdfIn PDF document text
    • http://detobusukited.iblogger.org/99538433185.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/mazanulime.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/UidDYUh/rock_and_roll_outfits_male.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/hf0afZm/53009724315.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/dupebutedepi.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/6gj9hf8/shotgun_gunshot_sound_effect.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/ynjgidN/makawumuxavubumadam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadoxosin.atwebpages.com/us_navy_uniform_regulations_boots.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/75528275657.pdfIn PDF document text
    • http://rolezudebozi.rf.gd/93981320804.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/baremugobalofudazo.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/29257168907.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/wamezivuxonaxexi.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/associative_property_of_multiplication_3rd_grade_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/f_b_service_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/57800221246.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD89 5076 bytes
SHA-256: 6f96ecfac72ab97b407727e71b80c684caeb382dd913a6740f632b179c1d4dfd
font_01_sfnt_off0000deb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB4 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000ea16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA16 9984 bytes
SHA-256: 8fb63d97aaa39df4f0bf20260db5cfcf62ab476ccc69ca6f7f69499231aa4dc1

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