Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32f436952ae01d1…

MALICIOUS

PDF

73.6 KB Created: 2021-03-14 18:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b1ae29cdcc4ad481ca27152ea19d5ec1 SHA-1: 31bc48a2f54023bcb9e1aa47e9408221475c1200 SHA-256: b32f436952ae01d113353680fb80726794ede86e0361b6832db0a6e82ae777ea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/wix?keyword=pearson+geometry+common+core+teacher%2527s+edition+pdf PDF link annotation
    • http://zagozogenef.sportsontheweb.net/sleep_sense_book.pdfIn PDF document text
    • http://lorubuxetorifa.medianewsonline.com/dixatawifutu.pdfIn PDF document text
    • https://padaduzarunum.weebly.com/uploads/1/3/1/1/131164270/52458.pdfIn PDF document text
    • http://fegiroxopirez.sportsontheweb.net/lesewurosifudekame.pdfIn PDF document text
    • http://zelopaqq.xyz/85919036475anv05.pdfIn PDF document text
    • https://xasigali.weebly.com/uploads/1/3/4/3/134363336/5409808.pdfIn PDF document text
    • http://sell-toclick.online/tiwufu7yzq.pdfIn PDF document text
    • http://artelamp.store/fisume32kbn.pdfIn PDF document text
    • https://fakazurirogedim.weebly.com/uploads/1/3/4/7/134743668/6675167.pdfIn PDF document text
    • http://bizifemodefi.mygamesonline.org/texaxopilup.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/27380878721.pdfIn PDF document text
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/db62f1bb8e.pdfIn PDF document text
    • http://getporte.xyz/tusabexavexld0w.pdfIn PDF document text
    • http://huseyincanx.com/how_much_does_starbucks_pay_in_arizona_2020o3hiv.pdfIn PDF document text
    • http://jarowulizose.sportsontheweb.net/vezonofonitad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/949b3527-86b5-4ff6-bb82-8bbfd9390f8e/juwimobegaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d30d3842-316e-4c22-baf4-ff511bcf3331/english_grammar_test.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/drivers_permit_ga_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/35037112534.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/mystic_messenger_zen_guide_day_2.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/sheetrocking_bathroom_walls.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/wenusofini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7463b49-c462-40dd-8f8a-d6612881bf78/89402429530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e9a1454-42dc-4287-bb53-817d87b640c7/dir-868l_firmware_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46B 5676 bytes
SHA-256: a4b14a574f53fa7ad07fd483dc16362cd2d2b2eb36f65378a6d20b8f872043c2
font_01_sfnt_off0000e79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79E 14464 bytes
SHA-256: 861776a9439564443c58fee0d94a5b90d9fa6a3341ce16dd2d19d257e6dd8dfb

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