Malicious PDF — malware analysis report

Static analysis result for SHA-256 14aca7c7e09fbfa5…

MALICIOUS

PDF

73.7 KB Created: 2021-06-10 01:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fc46e9fa92bce3eb76930582115a3f9d SHA-1: 756d6176915f1e8037fb77a79c29c98da1cc4cb0 SHA-256: 14aca7c7e09fbfa5b734cbd1ad33386fee743c60b6b9bcd797b0ef63b127dc4e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm designed to distribute malicious content. The presence of a 'flipkart hack apk' UTM term suggests a lure related to popular e-commerce or software, likely for phishing or malware delivery. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://smidgel.ru/pbw?utm_term=flipkart+hack+apk PDF link annotation
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/pavukil-todison.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_600af52a5d46a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_600fe09959716.pdfIn PDF document text
    • https://dugesadodi.weebly.com/uploads/1/3/1/1/131164249/kedober-gatogigibufog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5fda769c5c21e.pdfIn PDF document text
    • https://fapizorimuko.weebly.com/uploads/1/3/1/1/131164308/ganofimegoteri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495042/normal_5ffa350d71460.pdfIn PDF document text
    • https://durewipi.weebly.com/uploads/1/3/5/3/135301904/5630861c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_600febf621386.pdfIn PDF document text
    • https://sokezimipadivob.weebly.com/uploads/1/3/5/9/135959039/ccee783.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/toxaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446286/normal_6030d1fba4011.pdfIn PDF document text
    • https://diwefiramogepot.weebly.com/uploads/1/3/4/2/134265367/vojupenuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446019/normal_604f2e479177b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379233/normal_5ff67659d2cc4.pdfIn PDF document text
    • https://gakulenem.weebly.com/uploads/1/3/1/4/131437742/zoxikobifejira_worimijelagotip.pdfIn PDF document text
    • https://fivujage.weebly.com/uploads/1/3/4/3/134316273/fivedoz_novogegera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_6022b6f89c610.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457582/normal_60082003ed445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5fda4755d8f33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393019/normal_60104df3747ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepewuwakow.pbworks.com/w/file/fetch/144999141/physiotherapy_neurological_assessment.pdfIn PDF document text
    • http://pikalunik.pbworks.com/w/file/fetch/144868431/what_is_midichlorian.pdfIn PDF document text
    • http://sufasujozu.pbworks.com/w/file/fetch/144735708/expanding_double_brackets_grid_method_worksheet_tes.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_off0000e32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 4860 bytes
SHA-256: 6fafacfab5d09ab55547dff44c6587f318d0a210e36b80f98b5199f693b30eee
font_01_sfnt_off0000f3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B1 11024 bytes
SHA-256: 1923c1dd746cfcf414eaa552fdcda4cc965ece7fb5ae998c16bbd4783c191dd5