Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf60d829cc8a915…

MALICIOUS

PDF

76.9 KB Created: 2021-03-09 09:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 38db864cc6bf3788786ddc51c69a3279 SHA-1: 52f7a40eee62d77e6ca4d5110774e5439c04a093 SHA-256: 6bf60d829cc8a915cf695f70299ddcf70528a1202bac6d416d127084b6ef1df9
156 Risk Score

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 0.9997

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://jottigo.ru/strik?utm_term=where+to+buy+a+metal+detector+in+store PDF link annotation
    • https://peposinosodidel.weebly.com/uploads/1/3/4/3/134317522/c8c1bd4b0710.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/pagujeganidimojamadu.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/cKuxtVW/alien_monkey_full_movie.pdfIn PDF document text
    • https://gopoxigubujazu.weebly.com/uploads/1/3/0/9/130969754/659af3362816.pdfIn PDF document text
    • https://kofuwirobunugob.weebly.com/uploads/1/3/4/3/134318534/jizokejatuzomova.pdfIn PDF document text
    • https://cdn.sqhk.co/lefuwaregew/jecij7U/51545109625.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/idjhidK/space_engineers_small_ship_design.pdfIn PDF document text
    • https://xabisipejerifo.weebly.com/uploads/1/3/4/6/134634854/xafiwevupufos-fazawupebadaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/how_to_pass_ap_physics_1.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_1e6d69d4958c460f9b0a73779bb09d1c.pdf?index=trueIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_1a67b08938204b93b02b94f24599805f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benuka/kendo_ui_dropdownlist_mvvm_template.pdfIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_1a063010820142caabcc9b0b338a30c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwosil/30316426783.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/tamulukanutixesaradumij.pdfIn PDF document text
    • https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_7578bad7092f40239c6f62b63eaa7ace.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/overactive_bladder_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/wazetujuzulerat.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_9db175a6eba54171ada668a9c81ad3e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuxime/pokemon_games_for_gameboy_advance_free.pdfIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_6ba5d4cff17440c5885b5e6ce28cf220.pdf?index=trueIn 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_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 5436 bytes
SHA-256: b148d8165cb88973c55ad205a7d6ac295af9a237b51a93a8756d378201b9e97c
font_01_sfnt_off000102ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC 10404 bytes
SHA-256: b2ec78aa2472587873917468913643aea5ca340cf6c56c81a2afef17e0722f35

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