Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee2ad5166b4d50e…

MALICIOUS

PDF

78.4 KB Created: 2021-01-23 02:26:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6bb50475d7dae26daad5ffde2b67b930 SHA-1: dc503da4d0abbb28bdb18a7b19e455f8945105b1 SHA-256: bee2ad5166b4d50e0a35339d6584d2b1d39bdd5594cc785474460cc75aed27cf
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, forming a link farm. The embedded URLs suggest a redirection scheme, potentially to phishing sites or malware distribution points. The document body is heavily obfuscated and appears to be non-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=casio+aqw-100+manual+en+espa%25C3%25B1ol PDF link annotation
    • https://jepexilopenokaf.weebly.com/uploads/1/3/2/6/132680937/8154215.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/6327851.pdfIn PDF document text
    • https://site-1174886.mozfiles.com/files/1174886/adverbial_of_place.pdfIn PDF document text
    • https://site-1173612.mozfiles.com/files/1173612/lagu_pengamen_jogja_angklung_malioboro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465924/normal_5ff676f3c4930.pdfIn PDF document text
    • https://site-1176205.mozfiles.com/files/1176205/paxetune.pdfIn PDF document text
    • https://sigajijatikad.weebly.com/uploads/1/3/1/3/131379485/meximazevanu_dafimiwizub_xokafapef.pdfIn PDF document text
    • https://site-1249283.mozfiles.com/files/1249283/lagu_sabda_alam_chrisye.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/1644c6e7feb9.pdfIn PDF document text
    • https://site-1248228.mozfiles.com/files/1248228/25766255895.pdfIn PDF document text
    • https://site-1172118.mozfiles.com/files/1172118/lidotu.pdfIn PDF document text
    • https://site-1174180.mozfiles.com/files/1174180/bukanofuwezumi.pdfIn PDF document text
    • https://site-1173381.mozfiles.com/files/1173381/strikemaster_ice_auger_reviews.pdfIn PDF document text
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/fikimaxu.pdfIn PDF document text
    • https://site-1166728.mozfiles.com/files/1166728/plant_chromatography_lab_report.pdfIn PDF document text
    • https://xadaxiwunitari.weebly.com/uploads/1/3/0/8/130814235/gevir.pdfIn PDF document text
    • https://dibalinelig.weebly.com/uploads/1/3/1/3/131380687/3336579.pdfIn PDF document text
    • https://site-1168129.mozfiles.com/files/1168129/48547377751.pdfIn PDF document text
    • https://site-1249273.mozfiles.com/files/1249273/84128839964.pdfIn PDF document text
    • https://jizetexosobuwek.weebly.com/uploads/1/3/0/7/130740437/poladuruwira.pdfIn PDF document text
    • https://site-1177498.mozfiles.com/files/1177498/my_lips_are_always_dry_why.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5fe7101490fa7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF245 5432 bytes
SHA-256: 1e5a739c3acd9dcb444ceb2cb2ae5ff2d0b405dfb8604521d856d247600e351e
font_01_sfnt_off00010486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 11056 bytes
SHA-256: 7e621817100a9d6caec2dc9395409317056ec036dc3bd45c494b28a9f2817d9e