Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b03ff3e2116e66…

MALICIOUS

PDF

76.6 KB Created: 2021-06-01 01:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2560aeefb2069745aeb6753af90ff6ae SHA-1: b8d17c5577a8ad59ab681345da472338b5e22695 SHA-256: a0b03ff3e2116e66b124b94f31a72694411c2eff1eaad92f59ad26042963bd4d
156 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, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The primary URL, https://ketchas.ru/pbw, is likely used to direct users to a malicious site. No scripts were extracted, but the presence of numerous external links points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ketchas.ru/pbw?utm_term=what+are+the+duties+and+responsibilities+of+a+project+manager
    • https://kedixomavej.weebly.com/uploads/1/3/4/0/134017366/04e27cc65eb.pdf
    • https://static.s123-cdn-static.com/uploads/4370737/normal_5fcbb7efe846b.pdf
    • https://cdn-cms.f-static.net/uploads/4413977/normal_600a4107480a7.pdf
    • https://litaxavuve.weebly.com/uploads/1/3/4/8/134848922/pomofapoxas.pdf
    • https://telumenodizoxop.weebly.com/uploads/1/3/4/2/134266327/e27d2a16576.pdf
    • https://tuloforukidape.weebly.com/uploads/1/3/4/7/134752744/6486422.pdf
    • https://wimekigulaz.weebly.com/uploads/1/3/1/1/131163744/1fcdd.pdf
    • https://pefiritiz.weebly.com/uploads/1/3/1/4/131453982/920037.pdf
    • https://static.s123-cdn-static.com/uploads/4367301/normal_5ff9aaceab7b3.pdf
    • https://static.s123-cdn-static.com/uploads/4420037/normal_6005200fccc2e.pdf
    • https://gekibevuzoz.weebly.com/uploads/1/3/4/5/134503907/zurefagoduki.pdf
    • https://cdn-cms.f-static.net/uploads/4481272/normal_600c9fab22b04.pdf
    • https://mijagipiked.weebly.com/uploads/1/3/4/5/134524971/zivunelu.pdf
    • https://cdn-cms.f-static.net/uploads/4477655/normal_605d67fe95235.pdf
    • https://cdn-cms.f-static.net/uploads/4367624/normal_6012df9ce75bb.pdf
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/146765.pdf
    • https://sipexagugiresu.weebly.com/uploads/1/3/4/6/134607427/weres_xalulakeroxawa_lepagimazapa_jexepajonimix.pdf
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/582664.pdf
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/ae1178f25a.pdf
    • https://cdn-cms.f-static.net/uploads/4446027/normal_60437394c57c9.pdf
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/10df6c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/52e39db4-dfc0-45a3-b06a-ab7be2fa6e81/16175863888.pdf
    • https://uploads.strikinglycdn.com/files/3b9c2b2f-80d1-43c4-9f36-f7fec4870865/altec_lansing_life_jacket_waterproof_bluetooth_speaker_manual.pdf
    • https://uploads.strikinglycdn.com/files/3bdb15bc-a213-4202-863d-b8b8a1ef3566/what_soap_to_use_in_greenworks_pressure_washer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f4.bin
bc15b7da1cb7c6fa7178e4fa3636bf6748a95b27f037d82418f08f7d32abff3f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F4 5680 bytes
font_01_sfnt_off0000f51d.bin
ef5353d39ae8a8270f36f59d1c433daff5dd42b328ebec78e059ba79fcf3f25b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 9716 bytes
font_02_sfnt_off00011612.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11612 4324 bytes