Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a2b6751e7942a1…

MALICIOUS

PDF

87.4 KB Created: 2021-03-08 18:14:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ae8d75d3f92d8d1ded3f29605a935169 SHA-1: 40b9cde15cadc99ff3532238112778198b8475be SHA-256: e2a2b6751e7942a10c6e128da632856600a67211d7bd1dba7acedb26e4d7da7e
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, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body is heavily obfuscated, but the presence of URLs and the heuristic firings indicate a strong intent to redirect users to external sites, likely for further exploitation or phishing.

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://leonvi.ru/award?keyword=canon+g7x+mark+ii+manual+pdf+download PDF link annotation
    • http://filfex.ru/59103716993avws6.pdfIn PDF document text
    • https://manukigobedor.weebly.com/uploads/1/3/4/4/134481395/guzukekiseku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_6046493bccdb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_60413202aee17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_60430c62d5488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467017/normal_6020fa7cea1ff.pdfIn PDF document text
    • https://fogovuraperikog.weebly.com/uploads/1/3/4/7/134713912/2294783.pdfIn PDF document text
    • https://pubabugolutaj.weebly.com/uploads/1/3/2/6/132680974/fevopex.pdfIn PDF document text
    • https://jafoxoxuxovawe.weebly.com/uploads/1/3/0/8/130813536/67664e31c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463792/normal_601afec339dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422912/normal_600bcd0716cc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423155/normal_5ffe473ad0ef7.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/casanova_malayalam_movie_bgm_freeh5pe7.pdfIn PDF document text
    • http://brumbum2.xyz/85927365789hes85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_6025d23425231.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451231/normal_60045dd319816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_5feaf0bbe2f9f.pdfIn PDF document text
    • https://zudimawavisutet.weebly.com/uploads/1/3/1/6/131606198/b771bf28e05c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445326/normal_5fcf0dc71455b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484126/normal_5ff2d6c8e0983.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dotivaf/jisikibutakudij.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/11798061381.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/judowufanomotolezenam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA42 5392 bytes
SHA-256: bf679539191200400b1214753e60333f07ebdd997c2b8d4e9bd3aa70a0067cdb
font_01_sfnt_off00010cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAC 13572 bytes
SHA-256: c02c17c589f3dd70e3c6ce6448fe9ddb6ebe9cd971942e4315cdb10cb2f99aa1
font_02_sfnt_off00013852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13852 16684 bytes
SHA-256: 4cd55fee6c52bbab32ed20b0b25846bff407090075fa0ab45dc9808449a8eeb0