Malicious PDF — malware analysis report

Static analysis result for SHA-256 770c2ff0e35ca021…

MALICIOUS

PDF

82.8 KB Created: 2021-03-29 11:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7103c75dcefd3d366104f6a248fd443a SHA-1: 30ce17960adde1c6723757415489d9b5a392058b SHA-256: 770c2ff0e35ca021fcf742a90a746ca21b0ed3ee0d32ee4e0f58d2485a7ab02e
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to zajinet.ru, flagged by heuristics as a link farm on disposable hosting. ClamAV and an ML classifier have identified this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect the user to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=does+vegetable+glycerin+have+calories
    • http://riniwodifole.medianewsonline.com/soxewidun.pdf
    • https://zupalopozaguri.weebly.com/uploads/1/3/2/3/132302876/c9458.pdf
    • http://bumululoru.mywebcommunity.org/22458593970.pdf
    • https://lejalebenepuk.weebly.com/uploads/1/3/0/7/130776022/dunosejo-depafus-fugebatus-sigotidijubovuj.pdf
    • http://tazaled.22web.org/pascal_triangle_example_in_c.pdf
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/28d265fbb.pdf
    • http://kazotapojiwi.mywebcommunity.org/fumapipukufigipijirox.pdf
    • http://vorakumezaxof.mygamesonline.org/65461985069.pdf
    • https://kimuremosov.weebly.com/uploads/1/3/4/7/134732255/siwotititepiwuj.pdf
    • http://japamawosoj.mygamesonline.org/forezojikuxefipasejaz.pdf
    • https://vizijupazikek.weebly.com/uploads/1/3/2/8/132814338/tagobuko.pdf
    • http://xapiduxirob.mywebcommunity.org/45924255917.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xirixoxixewop.epizy.com/nigupufafabuzo.pdf
    • https://uploads.strikinglycdn.com/files/bd13d6be-4b24-4119-9a6c-6c03eda27230/where_are_mackie_products_made.pdf
    • http://bitenozof.atwebpages.com/autoregressive_distributed_lag_ardl_model.pdf
    • http://zamopikuziluw.epizy.com/universal_island_of_adventure_map.pdf
    • http://tasagut.rf.gd/assertiveness_training_techniques.pdf
    • https://uploads.strikinglycdn.com/files/1bfa6155-d2cc-43a7-b5b2-87fecf45d95e/pudidapilawatitep.pdf
    • https://uploads.strikinglycdn.com/files/74dc945a-2153-42a3-9de5-19c5a0739b2b/85367530433.pdf
    • https://uploads.strikinglycdn.com/files/20dba3cb-7bc3-4f31-80cf-d735b4d50dd5/bubunorinobaguwifopunitat.pdf
    • http://wisotoginiso.rf.gd/jamesovif.pdf
    • https://uploads.strikinglycdn.com/files/a0631b8f-fb99-4c0c-95b7-100b30cec3f0/30103355306.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010239.bin
f3b7056bd22ac39d6d95c99601d6e526a68421d3abece94e1a03adce9122e6bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10239 5364 bytes
font_01_sfnt_off00011486.bin
e05d20b5942491bc01f915b38ab2aa30c4d3b531a88c65b1735e3b4a4ee3e5c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11486 11664 bytes

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