Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b7ea10a08c5152…

MALICIOUS

PDF

90.0 KB Created: 2021-02-25 09:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dc2bd434155b6080326faa62c96de50f SHA-1: 5267f76f22270fcd9429ee027bc363338712db63 SHA-256: 13b7ea10a08c5152ded5887fa413528866714bfc21fe7fa20dda2eb8f5219993
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://baarspo.ru/123?utm_term=wahl+lithium+ion+beard+trimmer+manual PDF link annotation
    • https://cdn.sqhk.co/kuvuwisarov/lAic5gf/93981504500.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/ijYYjeL/74709795511.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/gfhgDUV/vejisa.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/59605028584.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/jegjgil/24072959512.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/you_never_eat_alone_the_series_eng_sub_ep_1.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/toyota_camry_se_2019_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/idKicif/mario_odyssey_travelers_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/bjcYCyL/iot_evo_lens.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/python_dictionary_reverse_keys_and_values.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/ifhjUpZ/highway_395_oregon.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/WghmjfH/98721360578.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/6gfrjak/kejafewekofo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/28149436291.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/levi_stadium_parking_guide.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/what_does_guerrilla_warfare_mean_in_social_studies.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/what_are_the_futures_markets_doing_today.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/is_eso_worth_it_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/jikafasogovivojike.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://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10329 5040 bytes
SHA-256: 275fd1467ec8f7d50dc66421979a3890c95c4945338c545d87529cb38d2d9fcc
font_01_sfnt_off00011423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11423 20968 bytes
SHA-256: 87985804ebf98b1030980f20b4e39595e1aa76caccafc3e7d64f2ca02509db1c
font_02_sfnt_off00013459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13459 11620 bytes
SHA-256: 1e3bdd9f8d5f1394ce5bda0b94f8b7cf836105b4bf4842c8cd643d298407842f

Open this report in the interactive analyzer, or submit your own file for analysis.