Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36169ea0966c50e…

MALICIOUS

PDF

70.3 KB Created: 2021-02-08 06:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b633dd5f9fb2270747c102cd8f5a77e2 SHA-1: 97e5787666c23fedd797cdac31c3afbbc7b4bf39 SHA-256: a36169ea0966c50ed970b401dc57f9cdedbde710b0258cebc9f43cf1800cbf72
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/123?utm_term=how+to+survive+without+a+salary+pdf PDF link annotation
    • https://pogunokele.weebly.com/uploads/1/3/0/7/130739789/tasajomisezikero.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/9b08b5df.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/hcYFnih/xobadufip.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/GgikjcD/semam.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/J0jfmjb/wenowemufekunefutaduguk.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/SBmhjjd/face_changer_mask_applicator_kmart.pdfIn PDF document text
    • https://minomawisagu.weebly.com/uploads/1/3/5/9/135956859/loviw.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/gngeieC/imfdb_city_heat.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/d1hahb4/super_wings_jett_run_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/djg1Uhg/bunikobewiluzoguvefo.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/dJhixhd/global_citizen_year_cost.pdfIn PDF document text
    • https://redutoxaxijarow.weebly.com/uploads/1/3/4/7/134760413/6283387.pdfIn PDF document text
    • https://dowazulipogopu.weebly.com/uploads/1/3/4/3/134322731/wanoletujakox_tunokeletuvo_dupudololemero.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/ladojenefe/38924511444.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/wipogirulum.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/android_bundle_fragment_example.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/executive_assistant_letter_of_recommendation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/winrar_win_10_free.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_off0000d722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 5344 bytes
SHA-256: 2e12d7a007e200bd47e65339adb5bbc4a3c3cec576d477fc33d8f2c5eddd09ac
font_01_sfnt_off0000e966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE966 10196 bytes
SHA-256: e6463707bba0be4133fa0026b06b0a5176d696d8ef0dfb5e50cce6093c102542

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