Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d6265843beb5ad…

MALICIOUS

PDF

66.6 KB Created: 2021-03-03 02:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8db3675ab7fb87b4a8b04769f7ed1ae9 SHA-1: 7d0c45153ba132c1930baed4157bb7e0e22a4f02 SHA-256: f2d6265843beb5ad6402a6655ebfac9c490fdbb6582dcab8222c3aee806f6ec0
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 content or phishing sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://dugedepap.ru/wix?keyword=better+homes+and+gardens+colebrook+outdoor+sofa PDF link annotation
    • https://bogigusojuvifu.weebly.com/uploads/1/3/4/3/134316749/ff3d41.pdfIn PDF document text
    • https://cdn.sqhk.co/xuteposidobi/6B7ibgi/8504468475.pdfIn PDF document text
    • https://demenuxukuxit.weebly.com/uploads/1/3/1/4/131438289/3429493.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/VjjdVV5/packers_vs_bears_2020_highlights.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/what_is_the_prefix_in_the_word_implacable.pdfIn PDF document text
    • http://telovajov.medianewsonline.com/infiniti_g35_transmission_fluid_location.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/tc_electronic_flashback_x4_delay_and_looper.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/Thbjfzo/calcular_iva_chile_2020.pdfIn PDF document text
    • https://nukofagola.weebly.com/uploads/1/3/4/8/134883999/demimonesowejo.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/bnhdGgj/oyster_auto_top_up_not_working.pdfIn PDF document text
    • https://mevukufidax.weebly.com/uploads/1/3/1/3/131379039/zobipiv_vuviduforopit_ruxedujaxisemi_nozesirijop.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/80156087838.pdfIn PDF document text
    • https://bewimesev.weebly.com/uploads/1/3/4/7/134753962/7408959.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/41144940604.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC770 5688 bytes
SHA-256: 098e99248ad10a65fe816b3291465cc7388df9bdc849a46cfb5947b0134d51e0
font_01_sfnt_off0000daa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA3 9696 bytes
SHA-256: ea9ee0a4512ead692d7b44f9398ec3897d7ba51f7ea1213b28c451a44da5637a

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