Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49f16925242d208…

MALICIOUS

PDF

177.7 KB Created: 2021-03-28 05:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8f01ac51d83e19730f7e063597f16f06 SHA-1: ad407f69e06e5088458fe9301da9bbe3629e22f4 SHA-256: a49f16925242d208929301390019ddc72084c31254a3c279a5432ba7a9318907
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=glide+elementary+school+supply+list PDF link annotation
    • http://kazexajisodibu.medianewsonline.com/potonidebefokofu.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/gdjhhbK/biwimibusamomikil.pdfIn PDF document text
    • http://bovibuvebus.getenjoyment.net/robino.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/resize_mac_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/ypG3Xij/piwubobebufizuno.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/44190272014.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_ae0a50ecfb894bd6bd72635143af9de8.pdf?index=trueIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_cde5064fe10c4d60a90a56fb85ef6018.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0fcc331-466c-4ea1-bfd3-3880cafbabe9/jinolomibogit.pdfIn PDF document text
    • http://gafuxibeveguv.rf.gd/pagifirubokef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0539a2aa-8715-4f79-91af-18ac0f55707b/metaphor_examples_in_the_book_thief.pdfIn PDF document text
    • http://lotawom.rf.gd/83848251111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba053f5-7aec-43bf-aa61-8c14f2b9e1b1/wenizabonetekuruma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a10aad-4761-4f2d-b8bd-27a5ffa1fa38/xigipupuwuduxajuj.pdfIn PDF document text
    • http://boribasumagit.epizy.com/39371472755.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_3674b22402a4477bbf2981e6b6e0871c.pdf?index=trueIn PDF document text
    • http://xoxekojut.onlinewebshop.net/polarity_test_of_induction_motor.pdfIn PDF document text
    • http://gavigepovu.epizy.com/77722993361.pdfIn PDF document text
    • https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_8814212c73484354bc836e9e5a315574.pdf?index=trueIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_568295485969444585101995edcc48f3.pdf?index=trueIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_40e10e84d82141f286673c9be5e858f6.pdf?index=trueIn 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_off00028046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28046 5448 bytes
SHA-256: d78f5af37b368cc706e7b722f2616da69a82ce004f875b56a118e8b274815c60
font_01_sfnt_off000292a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x292A8 11328 bytes
SHA-256: a1313af5edc5264620736168d922da35bf12c08af4778b05c3e4c27f9c741dec

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