Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b03880b33f9137…

MALICIOUS

PDF

87.3 KB Created: 2021-03-20 03:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: cc6cda20a1823859e550c1eadb17ff94 SHA-1: 8cf0f650e63c0045d0886ae94877add8f901c1ac SHA-256: 02b03880b33f91375bf40b4c71fde381a53691550c1cdb409bdf929f540223bc
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to host malicious content or redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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://ponafet.ru/123?utm_term=argumentative+text+worksheet PDF link annotation
    • http://gedatidigog.sportsontheweb.net/98654111683.pdfIn PDF document text
    • http://wobixoka.66ghz.com/amazing_grace_chains_are_gone_chords.pdfIn PDF document text
    • http://puwofipafemuvif.22web.org/24368296358.pdfIn PDF document text
    • http://nusixogej.iblogger.org/fubalakepugibisarub.pdfIn PDF document text
    • http://bavewemelemare.iblogger.org/84330850115.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/51971667595.pdfIn PDF document text
    • http://mixevome.22web.org/zagaludirakediwoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xezujuwevan.epizy.com/tejisebuvizujutigufus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19cf3be-ae41-4687-b79b-93a2b9c4c352/ramawoxowejuzonorefubupo.pdfIn PDF document text
    • http://kegibuluwuridof.epizy.com/78167992475.pdfIn PDF document text
    • http://kubosew.epizy.com/bible_verses_about_faith_and_trust.pdfIn PDF document text
    • http://kutezowifemiwe.epizy.com/cd_rom_burning_software_free.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_ab0dd6dfabdb4560b8f4172d1c6bd5ed.pdf?index=trueIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_90bb4f8671ed46d7bbebdf7d95ea21c1.pdf?index=trueIn PDF document text
    • http://foliminuga.epizy.com/8692807776.pdfIn PDF document text
    • http://valogaberel.rf.gd/50894035889.pdfIn PDF document text
    • https://abe99a74-823b-4c5d-85d6-f8d8de52422f.filesusr.com/ugd/73cc63_a7723c9bf8594f92b870a660a369b2bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f194539-7bef-4389-b7fc-6db5d8913a4b/how_to_replace_glass_top_on_kenmore_range.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_99716d18cac74d51a4f7f5dffc395f86.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_off000116bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BC 5340 bytes
SHA-256: 1b1ed55c257c4ca1e7232da889e142ad3d9e9f828c0ea846c858b929c6e4845f
font_01_sfnt_off000128d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D5 11484 bytes
SHA-256: 7d3e01157561e7e6194b6f93dea66db4d89523996e3302e41b1fc7b260cffc1c

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