Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bfe9956e83c8f8…

MALICIOUS

PDF

80.1 KB Created: 2021-03-09 21:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 10eb99674d8729d421bc3cef569168af SHA-1: fc9857a40373cacd5a6c6cd1114812f24f3c5890 SHA-256: 06bfe9956e83c8f89e6df1b0036c0f3639fb7343f2c4eb445afb40ac8e1fa13b
186 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. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains keywords related to search queries, reinforcing the lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wix?keyword=mount+vernon+indiana+wrestling PDF link annotation
    • https://tilakajunobeka.weebly.com/uploads/1/3/0/7/130739719/veduderatasus_timenotirumefar_rogijopegerote.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/how_to_charge_garmin_rino_750j4u9z.pdfIn PDF document text
    • https://vobijiwemifi.weebly.com/uploads/1/3/4/6/134673224/713604.pdfIn PDF document text
    • http://pollsexpert.com/vazatonukt0mlz.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/67372162539.pdfIn PDF document text
    • http://kyhni.site/62908680505nt14b.pdfIn PDF document text
    • https://rejawezegevipi.weebly.com/uploads/1/3/1/4/131437848/9826688.pdfIn PDF document text
    • http://poradoit2.site/323362575666xib2.pdfIn PDF document text
    • https://vijisazegogufob.weebly.com/uploads/1/3/1/3/131380966/7401199.pdfIn PDF document text
    • https://rinuxusopav.weebly.com/uploads/1/3/4/6/134679155/kodasajefilam.pdfIn PDF document text
    • https://diwesosun.weebly.com/uploads/1/3/2/6/132695938/aeb38.pdfIn PDF document text
    • https://mulofujuxemo.weebly.com/uploads/1/3/0/8/130874025/59f40fb3.pdfIn PDF document text
    • http://handler-autoscout24.com/serewodotewlw7o9.pdfIn PDF document text
    • https://rumodabumuxe.weebly.com/uploads/1/3/1/8/131857513/c6fe2795.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/pre_op_medical_clearance_icd_10.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/canon_powershot_a560_memory_card_error.pdfIn 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://uploads.strikinglycdn.com/files/3c871bfc-5c68-402b-8022-52cd0124d309/48337162321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44f7b17-0bca-4ea2-94d6-7dee0314e6ad/94826476565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7e30e5-74cc-421e-b681-84188dc4284f/momalinibufakekofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72e69029-db58-49d8-a2c7-f06b2e2ef67d/99103591854.pdfIn PDF document text
    • http://gagemusogigubew.epizy.com/chrome_portable_zip.pdfIn PDF document text
    • http://dexegesen.rf.gd/brahman_naman_full_movie_hd.pdfIn PDF document text
    • http://xevunikusixed.rf.gd/zusufawipivin.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_off0000ee56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 5032 bytes
SHA-256: 4322a2762134df116935d291250a8d31d8573e16e8f9e6bec33a881bb0499faf
font_01_sfnt_off0000ff97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF97 10832 bytes
SHA-256: 41994e081356c048723f79eb37dd09b3a1fd5907e6036e116d133f8ff2faaae2
font_02_sfnt_off000124a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34