Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ba53576a0cd248…

MALICIOUS

PDF

72.9 KB Created: 2021-02-15 15:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 17a69b09923347d76e37e83c2f594564 SHA-1: 159760d25488f88e9b84f1a0fc054508cc336575 SHA-256: a3ba53576a0cd24819416ea2ae6a6fa36795d978d34dd1f1cd319fa1eb6d7d12
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=sardarji+jokes+malayalam PDF link annotation
    • https://cdn.sqhk.co/vipujitebiki/vjgiggg/hockey_stick_putter_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416125/normal_5ffc59f58593e.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/iao2jdr/kixikafo.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/UzjihhX/rugenokolifijiganum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371812/normal_5ff7eca6c5638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_6014d1f3a27be.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/fjdInij/52178519059.pdfIn PDF document text
    • https://cdn.sqhk.co/rogekanus/xgjjad0/gidovipowun.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/heSRXUD/age_of_empires_2_expansion_best_civilization.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/wihhfae/gun_builder_3d_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lefumus.rf.gd/merge_join_cartesian_performance_oracle.pdfIn PDF document text
    • http://xukorigukem.rf.gd/bapubelim.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/wubesakegezixozal.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/33885476425.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/jurassic_world_fallen_kingdom_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/asean_quiz_bee_reviewer_2019.pdfIn PDF document text
    • http://wekameti.rf.gd/61583473018.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/79479303349.pdfIn PDF document text
    • http://nixevafuzija.epizy.com/carbon_electrochemical_and_physicochemical_properties.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/platform_sandals_black_cheap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD552 4916 bytes
SHA-256: a6b52f083d8a037bc72d934f018559122141bd11fe10c08d9a1b6cc067b2e971
font_01_sfnt_off0000e609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE609 10084 bytes
SHA-256: 5c6b27af3ad46e58b7e22c855d6f7da1b4907066e4ab16fa80774015684bcf3b
font_02_sfnt_off0001087b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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