Malicious PDF — malware analysis report

Static analysis result for SHA-256 031107a741c27d14…

MALICIOUS

PDF

102.7 KB Created: 2021-03-22 11:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 809b415380e3a95c1e283a26af06c247 SHA-1: e630c775670887900a675a7678937ccea1fb9b6f SHA-256: 031107a741c27d1442b80be1ffba6f9cedd72afbb10e6d739f0670141499396f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a brand-impersonation credential phishing lure for Facebook. The file contains numerous external URIs, many of which point to disposable hosting and redirectors, indicating a phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://pabixiwirixe.weebly.com/uploads/1/3/1/0/131071256/bca6e1cf4d20.pdf.
  • 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=corrugated+gi+sheet+size+philippines PDF link annotation
    • https://pabixiwirixe.weebly.com/uploads/1/3/1/0/131071256/bca6e1cf4d20.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/can_you_take_your_permit_test_online_in_north_carolina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488855/normal_5ffc050d98093.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/watozixamidodowixexori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449405/normal_6058065f638c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_6015ffc4590f1.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/LgiQxcw/french_nails_and_spa_san_elijo_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/fOhjwji/99017154958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_5fd0fbca37081.pdfIn PDF document text
    • https://puxonuge.weebly.com/uploads/1/3/1/3/131383548/lipiwusikabokufujuv.pdfIn PDF document text
    • https://numetigovav.weebly.com/uploads/1/3/1/6/131606493/2210851.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pizibajavodup.epizy.com/gigaset_as405a_cordless_phone_with_answer_machine.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_f6ac0f7d7f0d4185b187b2236df5a116.pdf?index=trueIn PDF document text
    • http://towupew.epizy.com/binary_options.pdfIn PDF document text
    • http://zazuxidavo.rf.gd/34137132078.pdfIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_f2dd9d2547264f21baafeb0853e78ea2.pdf?index=trueIn PDF document text
    • http://musarozopod.rf.gd/calorimetry_lab.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE6 6960 bytes
SHA-256: 643eaf6dee57787e0fe62047546b2dbf6ac708ed3d60c1db8e93aafcf1edead7
font_01_sfnt_off00012ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA6 5176 bytes
SHA-256: 80c2e7c71ffe193765526dee74ff6bad29b5fca1f765a760b2b3a05ff2424f3b
font_02_sfnt_off0001403a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1403A 2472 bytes
SHA-256: de55cc0f84605e14a57de83457149e394dd830bafc1189a7a6f7dcaea10453df
font_03_sfnt_off00014abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ABC 12536 bytes
SHA-256: 8064626e308d87076695354b1d49b7145fc37202f6fac485d52e0800a7220bfa
font_04_sfnt_off000175a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175A1 16168 bytes
SHA-256: 252a907607fe8cf2d36f1e9c44c1986127e79ee03ae35aaafcaf9f4d1a976959

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