Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4648f69a7087f4…

MALICIOUS

PDF

80.6 KB Created: 2021-03-28 16:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bf0de8592c69fcadc0eeb98426d40c4a SHA-1: c1f09daa9f9628befed94f525157d9447b317a03 SHA-256: ea4648f69a7087f4d648d2a04570e1d6e5da97ee9876469978abcfb661c0e7b7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, with one specifically pointing to 'bologen.ru' which is indicative of a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a malicious intent to use the document as a deceptive landing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=bad+feminist+pdf+vk PDF link annotation
    • http://cartest.pro/gartner_siemqed1q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477379/normal_5fea056a12cc6.pdfIn PDF document text
    • http://okrasote.info/router_asus_aimesh_ac1750_rt-ac66up6ic4.pdfIn PDF document text
    • https://fozuxuvaporoj.weebly.com/uploads/1/3/1/8/131856883/dccc6c176d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_602861c8289b1.pdfIn PDF document text
    • https://wikejawuwe.weebly.com/uploads/1/3/1/4/131437941/4182601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_60462a5499eda.pdfIn PDF document text
    • http://yewes.fun/vubusipiwaturivuvupkmrq7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_601be6e289a46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f1888b6-cdab-4603-9914-1cf81a8b29aa.filesusr.com/ugd/6846fe_21a901830233443b8ea7f335b20b9e0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rotowan/jisilujuzodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0f03f7-e5fe-4ee5-95ed-5f459b43feeb/ejemplos_de_monografas_hechas_en_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c53af1a-2a9a-46ee-b3ac-4075bf18054a/what_are_the_elements_of_kinetic_sculptures.pdfIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_46a48f6eb467497dad5f8c87e7fa2c51.pdf?index=trueIn PDF document text
    • https://1160a196-6e18-49bd-931c-438029629b47.filesusr.com/ugd/40338c_903c96dd658241019a7c7ba4e5dd9b93.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc32c3e8-ee91-4283-b375-c5790dfb63b0/walt_whitman_mall_huntington.pdfIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_8c94dc44dbab4ac0b774de65f160cb9c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ee6a63-1bd7-4241-adb2-e36e93d4aba3/31694209962.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/8838473336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bc7ca7-f145-40b0-8ea6-26d700484454/reflective_essay_marking_rubric.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_off0000fbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDE 5232 bytes
SHA-256: 2e49faabe202dbd2969c582ba7f021de6a0a5beb9b08af24b08d1a069ee9ff37
font_01_sfnt_off00010dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAE 11336 bytes
SHA-256: 4c4c7544a669b0c2ff1be4a26f2e4cc35b133cfccc8acfc83a117cf88032e04b

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