Malicious PDF — malware analysis report

Static analysis result for SHA-256 0362715088b2fe0a…

MALICIOUS

PDF

82.5 KB Created: 2021-05-28 06:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8c16d355da7af6227593c7f911f86d6c SHA-1: 28d3e5904514b8a0356ad4d2f7cd5dac0b6c94ca SHA-256: 0362715088b2fe0a877a5351e80241336491fbe4d9c62a9e53ea0719b5b10ca4
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. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, likely serves to direct users to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/strik?utm_term=how+i+love+thee+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366020/normal_603247bce5ad8.pdfIn PDF document text
    • https://jirakevajiw.weebly.com/uploads/1/3/5/9/135966085/1265365.pdfIn PDF document text
    • https://garizoruzaxa.weebly.com/uploads/1/3/3/9/133986237/0ade7ace920a43.pdfIn PDF document text
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/e036c.pdfIn PDF document text
    • https://wadabugijiri.weebly.com/uploads/1/3/0/8/130873870/63ce4fd00c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_606a92c496fbd.pdfIn PDF document text
    • https://mowolonob.weebly.com/uploads/1/3/4/8/134874237/saseji.pdfIn PDF document text
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/6475265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_60696193cda73.pdfIn PDF document text
    • https://pazonijozofax.weebly.com/uploads/1/3/1/6/131606668/jisoritowi.pdfIn PDF document text
    • https://sazigusejif.weebly.com/uploads/1/3/4/7/134771803/lawitefuvekofodesef.pdfIn PDF document text
    • https://linowatudevenur.weebly.com/uploads/1/3/4/5/134599813/wegobipivosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499351/normal_6046342072dc7.pdfIn PDF document text
    • https://jixevimevulu.weebly.com/uploads/1/3/4/6/134659689/zelikazasuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_5fdab37360562.pdfIn PDF document text
    • https://vipagazowarofi.weebly.com/uploads/1/3/4/6/134685611/ninuluvifegoz_risitupenuzinox_gunodakesokup_liwiguw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_60185fa45182f.pdfIn PDF document text
    • https://lulefimoka.weebly.com/uploads/1/3/2/7/132740328/f64be65d39e9a.pdfIn PDF document text
    • https://newakikijako.weebly.com/uploads/1/3/4/3/134351088/judux_janezugiged_zujosu.pdfIn PDF document text
    • https://vetazewufa.weebly.com/uploads/1/3/2/8/132814418/xavukagozamizifigir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501659/normal_5feb23f78ca5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5fe6fe4577c2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff297d8-8481-4091-ba46-4dc7ec532d3d/63221074768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4221c247-ca5a-4a94-9492-8a959c2bd3e5/61444938025.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_off0001059e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059E 5140 bytes
SHA-256: 810d99df7af892ac2dcb8fc1ff9bf0244c9e788f3f91f68b4c11afe6f713e74b
font_01_sfnt_off000116fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FE 10988 bytes
SHA-256: f5a2f489dc28220fdc181cb0e23e29bf043e75bffe33951144c2140b9665a325