Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b2291c199a65b9…

MALICIOUS

PDF

73.1 KB Created: 2020-12-15 00:33:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b05159f28a76b5071ec624225439bd86 SHA-1: baa1591cfc2978824b819a4afc0905b47e3139f9 SHA-256: d7b2291c199a65b9d5f0fc4a44ee0a857971befb439abe7f83cf6aca2febdf48
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 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://trafficel.ru/strik?utm_term=warriors+and+citizens+american+views+of+our+military+pdf PDF link annotation
    • https://kivofijola.weebly.com/uploads/1/3/4/3/134309380/81fbc1.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ef82e0d.pdfIn PDF document text
    • https://sopopubepomexak.weebly.com/uploads/1/3/4/2/134265445/viwosapamokofora.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/tasezekavudosewulo.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/kaxufusopebavu-panovonuwa-susuzanubabut-lunokezavez.pdfIn PDF document text
    • https://xomitemekebok.weebly.com/uploads/1/3/4/8/134881854/6181466.pdfIn PDF document text
    • https://telozigigozato.weebly.com/uploads/1/3/4/3/134310186/kasibebimir.pdfIn PDF document text
    • https://ramaxuvezida.weebly.com/uploads/1/3/4/3/134327775/dowovolasuka.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/jojekinujinopu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6b83dfdd95b60d5131d/t/5fc0f1ed3c02f22b9d2f5f1e/1606480366330/kate_spade_glitter_keychain_wallet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fdcd09b-3b33-4334-82eb-48c21f795472/kadoburubiwaz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc101809698b02c7f2130ce/t/5fc569a9bc819f1cf48f0a3b/1606773161192/discord_dark_theme_color.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc376cddf132613bbcdefad/t/5fc48b6308845d09241b4c82/1606716260986/10536366436.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_off0000e0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BD 5616 bytes
SHA-256: ba09d6c524bc85e104834c5bac8b7976913019e003e1cfae3139ce9340312fbd
font_01_sfnt_off0000f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 10544 bytes
SHA-256: 5535850ce91495e768e1a1b24657c30f4fefe82198aff455db2637d5d0b9ff8d

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