Malicious PDF — malware analysis report

Static analysis result for SHA-256 838ac910c8dd3d67…

MALICIOUS

PDF

89.3 KB Created: 2021-01-30 01:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c31180ba6305bc9594f7cdca571f5f16 SHA-1: 533ff9f21ac7be179d5d5e1dd68c437a4ff62b5d SHA-256: 838ac910c8dd3d6768404b3876ce7795f35eb21d876af41ce895e3a7513850e9
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or phishing operation. The embedded content, though heavily obfuscated, suggests an attempt to redirect users to malicious sites, likely for further exploitation or credential harvesting.

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.
  • 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/123?utm_term=landscape+urbanism+reader PDF link annotation
    • https://zomuguwiremadak.weebly.com/uploads/1/3/1/4/131406071/fa4a132c6892.pdfIn PDF document text
    • http://gojepifega.22web.org/16939229410.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479674/normal_5ffcf0f630db8.pdfIn PDF document text
    • https://rutikaxa.weebly.com/uploads/1/3/0/7/130738846/4270031.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/075115.pdfIn PDF document text
    • https://gutoserenenew.weebly.com/uploads/1/3/2/6/132681448/08464.pdfIn PDF document text
    • https://naxulukituno.weebly.com/uploads/1/3/4/8/134879135/sanaxilefe_xirujixob.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/vizefumonafexokufapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_6009dd96acf2b.pdfIn PDF document text
    • https://vezaruve.weebly.com/uploads/1/3/1/3/131378950/fefaxekajufifubukugo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497346/normal_5fecfdfacca94.pdfIn PDF document text
    • https://sorurilinoko.weebly.com/uploads/1/3/5/3/135397097/0ec5abaae06d29b.pdfIn PDF document text
    • http://pezisafepogux.22web.org/saxuzigomewu.pdfIn PDF document text
    • https://bozobazevadetob.weebly.com/uploads/1/3/1/6/131607158/jajafa.pdfIn PDF document text
    • https://zaxonoso.weebly.com/uploads/1/3/1/3/131381259/fopivimorukaw-zudapubir-xekezevunora.pdfIn PDF document text
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/texariguvedu_supesujorewozer_xoxafamewuzugog_gavonowimoxov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lawupoxag.epizy.com/levopisikomulupi.pdfIn PDF document text
    • http://mijikabetabup.rf.gd/barron_s_ielts_practice_exams_book.pdfIn PDF document text
    • http://vizulubafaxal.epizy.com/chimni_pakhar_marathi_film_songs_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_off00012175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 5268 bytes
SHA-256: 5b9551ed423e27f479a636501da1db36b9057b4ec681a2ff760f07b03250baa6
font_01_sfnt_off00013349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13349 10776 bytes
SHA-256: b759490455e6497d36d0b3e7a200fa849c23622892a089e300d485b242e54129

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