Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e32504c9b7d937f…

MALICIOUS

PDF

77.1 KB Created: 2021-03-04 13:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cb727813e5a2ce838591f2a6eada18c1 SHA-1: 4e23fd1d3279535341c3cdfaacfe485791beedc5 SHA-256: 9e32504c9b7d937f9fb08d449f133c435772c84a7aaf86d8207df4d7435e6b2a
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were explicitly extracted, the presence of numerous external URIs and the overall structure strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=garmin+50lmt+drive+assist PDF link annotation
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/ee29c65f50b978a.pdfIn PDF document text
    • http://begemotiks.fun/806982323783k8zk.pdfIn PDF document text
    • http://juvovagesubo.mywebcommunity.org/introduction_to_java_programming_liang_12th_edition_download_free.pdfIn PDF document text
    • http://nerroba.info/how_do_you_say_ti_amo_in_englishpu2o1.pdfIn PDF document text
    • http://bit7.top/how_many_watts_is_the_vizio_2.1_sound_barxxqz8.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/jaDG8Hp/35738160840.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/90108921151.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/BhayYRg/19598825361.pdfIn PDF document text
    • http://best-ital.fun/ping_pong_3d_table_tennis_racketsuf0u.pdfIn PDF document text
    • http://armada.technology/vander_fizyolojisi5gly3.pdfIn PDF document text
    • http://mebelrostov.ru/253172140076c6jn.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/2ifXxih/cat_running_away_from_home.pdfIn PDF document text
    • http://biggymstoe.com/migekalasule43ae.pdfIn PDF document text
    • http://prizyivnik.ru/65448339602c6owc.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/d140a.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/hcihWwX/sound_effect_free_wav.pdfIn PDF document text
    • https://doritader.weebly.com/uploads/1/3/4/8/134885844/a381c.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/6f709b4cb0092b.pdfIn PDF document text
    • http://atomlinux.com/51922451588f23pv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_26dda4ff421648209f946c1bd02fc0f8.pdf?index=trueIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_26d087ebb0b2458d9c51316b1325b3df.pdf?index=trueIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_9acbe1dd5fe845a98394dd9662a529af.pdf?index=trueIn PDF document text
    • http://kewetanetoza.atwebpages.com/87918696207.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/panasonic_cordless_phone_batteries_ni-mh.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_7232efc30c224dcab698fe3daf8db564.pdf?index=trueIn 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_off0000ef7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7E 5328 bytes
SHA-256: 9bc2cdfa8e6ff5b14a82c4890ca1feaded8932b06d289620fac024f4a9c80c0b
font_01_sfnt_off0001018d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 11124 bytes
SHA-256: b11af4499de5e17d765ec7b57912181bd2189656caec8c4a054561debcb41943