Malicious PDF — malware analysis report

Static analysis result for SHA-256 908ab44a80ee1ea0…

MALICIOUS

PDF

74.9 KB Created: 2021-03-18 08:11:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2538842d4d967f53a100ca19e4b2e7bb SHA-1: 93fc69564b50dcc49624d52fb3eecc7cf0f79e46 SHA-256: 908ab44a80ee1ea05675105ce93d63b2643d662e0c2678734114f985d27dc19d
196 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically related to payment redirection or bank detail changes. It also contains numerous external links, many of which are likely part of a link farm designed to obscure the malicious destination. The primary malicious URL identified is 'https://resalured.ru/wix?keyword=coins+gain+8+ball+pool'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://resalured.ru/wix?keyword=coins+gain+8+ball+pool
    • https://latuzeke.weebly.com/uploads/1/3/4/8/134884471/6074340.pdf
    • http://avlto.best/gajobebunagevislb1jq.pdf
    • https://jepexilopenokaf.weebly.com/uploads/1/3/2/6/132680937/bigolamen.pdf
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/nitefalidesikozugale.pdf
    • https://lopazilavorelid.weebly.com/uploads/1/3/4/0/134097689/vejel.pdf
    • https://cdn-cms.f-static.net/uploads/4375196/normal_602eea2429d79.pdf
    • https://netiwililisal.weebly.com/uploads/1/3/5/3/135398280/f5a5a6fd.pdf
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/xepizalo.pdf
    • http://plafond.xyz/fomuxobotufuvoxeremel7bkg.pdf
    • https://static.s123-cdn-static.com/uploads/4421354/normal_6008ba4e69f25.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jazofi/heat_template_openstack.pdf
    • https://uploads.strikinglycdn.com/files/fce43b0e-6286-43f4-aadc-02850fe9c404/62697044809.pdf
    • https://s3.amazonaws.com/legobegutulo/fundamentals_of_heat_and_mass_transfer_8th_edition_hardcover.pdf
    • https://uploads.strikinglycdn.com/files/74e49527-86ab-4298-9abd-f97d586ee9f7/iso_9001_tahun_2015_bahasa_indonesia.pdf
    • https://uploads.strikinglycdn.com/files/9331d70f-a61f-4251-8933-7ed60265e303/78336670518.pdf
    • https://s3.amazonaws.com/jolunenafobuw/intra_abdominal_infection_guidelines_2018.pdf
    • https://s3.amazonaws.com/rimejiguvif/apple_music_android_not_opening.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce99.bin
0e0ecae89bd641dab6f522605df5ffd8302424fcb4843aa9c1e506d3725e6a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE99 4836 bytes
font_01_sfnt_off0000def7.bin
6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF7 2092 bytes
font_02_sfnt_off0000e89d.bin
9d9e39b07a34bff7aff8a53c46f6d5b19e2e7a2cc7cfa97629095d3d3c85d58e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE89D 11032 bytes
font_03_sfnt_off00010e5e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5E 4324 bytes

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