Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2c17b212a446f5…

MALICIOUS

PDF

90.0 KB Created: 2021-03-11 00:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 31efc03f29dd50b7d63351c82cceac64 SHA-1: d31e9762572e9ff327c200b115ce9c6a5c81daac SHA-256: 1f2c17b212a446f57391e33c0a436ca8a549fba0feecdc83b9e715e4c2a062cb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a "PDF link farm" designed for SEO manipulation. The embedded content, though heavily obfuscated, suggests a lure related to 'Caddo lake bass fishing guide'. The presence of external URLs and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://midufefew.ru/123?utm_term=caddo+lake+bass+fishing+guide PDF link annotation
    • http://kubosikavudux.mygamesonline.org/steve_jobs_quotes_death_bed.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/dhbigja/surah_al_shams_arabic.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/rebofanegenodogize.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/malufozugutewarujami.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/he1gcje/games_in_dreams_criminal_detective_story.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
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_1fbaf82442da4cd18d83eefc4141abb7.pdf?index=trueIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_27ebfe4cffe647e297d6d95b9db73216.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/xazerus.pdfIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_4221c69ad1114694a5f7fa0dcebd9ebb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xozeb/cestone_tavolino_flexform.pdfIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_d3036d6c408346c2b1e1dc7c81467a07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/98432403408.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_82b2fc2934a94a478d0def68f941300e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/the_monkey_wrench_gang_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2aac27-b481-431d-bb9e-2314d9467849/club_car_precedent_seats.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_38d733a26ae34d84a006aca125b7190e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f6e76c-b258-44c5-82b6-08779b3dee46/thank_you_mandarin_symbol.pdfIn PDF document text
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_ff9116a8899f4724bb799af5ca0dbab5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f455c48-13c1-48fd-8fbc-04ee55e5ea6b/60762380462.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/36111512137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd420277-d07e-4d09-9246-d62650844fa7/xofopusukimibibik.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_off00011395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11395 5100 bytes
SHA-256: e389d4487531f7387a88b4e91ea67b426b7e0e83071be0b92fabd4985a2beee8
font_01_sfnt_off000124e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E3 11680 bytes
SHA-256: 338a248426582cbfbae259438a2d3f1ee9cc1c40f2135883dba80c64bbe3a78d
font_02_sfnt_off00014c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C72 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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