Malicious PDF — malware analysis report

Static analysis result for SHA-256 80818cf4079c5f5e…

MALICIOUS

PDF

79.0 KB Created: 2021-03-27 21:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8fb7ecd6cd254e30e4798e8751cbb971 SHA-1: e34acf319e9d901eac71b3709005da246905d26c SHA-256: 80818cf4079c5f5e456ce5e7c1e18473bacc866776808d02f2cfae8181e51a1e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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
  • 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.
  • 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://leonvi.ru/wix?keyword=unblocked+pokemon+games PDF link annotation
    • https://cdn.sqhk.co/tanusulirava/sMkgdd9/wolusosanirokivusuwabali.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/jaDWpjf/91351602053.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/wjaRhjr/happy_sandwich_cafe_mug_sandwich.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/diahe7l/gelamakukewolovotosuxaz.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/igjhdgf/adventure_quest_3d_leveling_guide.pdfIn PDF document text
    • https://zerimesatevig.weebly.com/uploads/1/3/4/8/134879836/5144875.pdfIn PDF document text
    • https://gepufefodu.weebly.com/uploads/1/3/4/0/134013389/5338023.pdfIn PDF document text
    • https://fojawejor.weebly.com/uploads/1/3/4/8/134886237/78a1d.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/f09253e4-a026-4166-8cb9-0a6c3c74ab85/excel_2013_free_download_windows_10.pdfIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_2b084dee68de4480a732f75f6f3bfa83.pdf?index=trueIn PDF document text
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_3ea6cf40b5be40e78318dc83db176a16.pdf?index=trueIn PDF document text
    • https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_bed34d53b9414f4098742b9c7c041f06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/doxifuba/simcity_4_camera_angle.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/58075051579.pdfIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_911bca4352c64c62bd6ed4c636dae99f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/regovadeje/cover_letter_template_word_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/dd_5e_character_book.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/fake_id_card_maker_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd667492-a57a-426b-b6ca-cc26196aeb0e/31583241684.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 5492 bytes
SHA-256: 03e13c5ef90d7b715624bcbc7a17606533f076eaf6fb5fdc5063d6c3f88193c1
font_01_sfnt_off000106d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D4 11860 bytes
SHA-256: 67dd085f411d6d95b25d2e11d8fd4d49b6bf7a7e3ea6e3c1dabf6decaaed2cdb

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