Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf324b5116524a7…

MALICIOUS

PDF

83.3 KB Created: 2021-03-18 06:27:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: beafd88126343c71e70089acce9ebf7e SHA-1: 033be9f8350451a0a443bb77d61d541e78db31bf SHA-256: eaf324b5116524a7c00ca8b33fd51b345e861d5aa47bad69f81e8832fb37bb52
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one prominent URL pointing to a suspicious domain, suggesting it's part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to a study guide, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://lozipotod.ru/wix?keyword=guns+germs+and+steel+study+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455916/normal_60131911e5a9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424630/normal_5ffe6f60588ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417980/normal_6013df582bf08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_60206fa4f228e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_5fdac93095410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475375/normal_60132dafbb93b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_60460b93417d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404500/normal_5fc79c84ea8bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403418/normal_5fc9fe8b4888a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475559/normal_603b1f74c35bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493553/normal_5fe317ab68930.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460981/normal_5ff550f256325.pdfIn PDF document text
    • http://pidijajuwupurop.medianewsonline.com/kanukitivatubebudine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vexabimumemig.atwebpages.com/36253539985.pdfIn PDF document text
    • http://nefigubisi.epizy.com/tree_of_life_back_tattoo_female.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6098246a-e815-4546-be2d-f073949075b2/the_magic_school_bus_rides_again_in_the_zone_soundtrack.pdfIn PDF document text
    • http://tuneluxowimosa.epizy.com/tobodonivirixumefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ecef4a-aad0-47ff-b996-a3224c9807b2/sowajakamaxoni.pdfIn PDF document text
    • http://jipinasin.epizy.com/tnpcb_assistant_engineer_syllabus_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5bca6e-d07d-4697-a228-c412258af3e6/fezuwuja.pdfIn PDF document text
    • http://koriguno.rf.gd/4774326713.pdfIn PDF document text
    • http://sajokebebax.rf.gd/39692480444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489911a0-d907-4803-a8ce-40d8a1ec6e8d/77369424593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473307e2-d5f1-4059-bba7-fd98c9d19595/zoxogi.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_off00010a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0A 5280 bytes
SHA-256: 27f5032f4beba83d82cd24d63f332548fc295c42512cfa2b2ea63d386f597d39
font_01_sfnt_off00011bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF0 10524 bytes
SHA-256: 8a05e5f9a84609d271f1e3440e113e3f6981942d7fc746037d37fba20512ab34

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