Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3cab85019d0d68…

MALICIOUS

PDF

82.9 KB Created: 2021-03-09 11:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 386b0d18f7b52968194933e45501dfac SHA-1: d80d3af5cf479b1963e529024527dc9688212bdb SHA-256: bf3cab85019d0d68d0e774f14140d0a9fe2cb9501523a23fd5e33abdfefa88a6
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a mass of external links, suggesting it's part of a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a template, likely intended to deceive the user into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=blank+rate+confirmation+template
    • https://cdn.sqhk.co/mujawiru/hMpnohf/4215328433.pdf
    • https://limotesatax.weebly.com/uploads/1/3/1/8/131871768/sevegojif.pdf
    • https://cdn.sqhk.co/valujoper/jejd1LZ/green_party_presidential_candidate_howie_hawkins.pdf
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/51c8ca50.pdf
    • https://cdn.sqhk.co/zurefaxenov/doihWNW/lafutelijarivaposamun.pdf
    • https://cdn.sqhk.co/tabuguran/Nljbsq4/53984719244.pdf
    • https://kulufitobapesad.weebly.com/uploads/1/3/4/4/134443603/088c088.pdf
    • https://cdn.sqhk.co/fabokofe/cigtqib/history_of_art_2001_osu_quizlet.pdf
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/3114608.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_1732a901f37b454dafc28eaf36fc2b41.pdf?index=true
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_d029f317b3d1476f8293e59ca2dc7955.pdf?index=true
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_0bbc1db7a6004aaaa71eb591ae44554b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/43bc6965-cbb4-4a83-9a94-f7eb99235ae9/laratepuvalamawo.pdf
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_39d40678920c437ea988fdc5b98ce992.pdf?index=true
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_87fc1afb6ff64522b47782d9f2c448de.pdf?index=true
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_17d9eaa33d0a4b35a4d2e453df0bdeb7.pdf?index=true
    • https://s3.amazonaws.com/kotidox/xasoxedevukofererok.pdf
    • https://s3.amazonaws.com/lupuvogotog/dynasty_warriors_5_empires_guide.pdf
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_4052ddc3230749e9b4b064a23f5a48a5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/24879e7d-c75c-4c76-ba89-5cd27e70060c/fediritekikolas.pdf
    • https://uploads.strikinglycdn.com/files/e08ee3ff-e54d-4550-abbf-24d704801289/xoregibu.pdf
    • https://uploads.strikinglycdn.com/files/4d07c794-fbb8-434a-b9e1-9de4f31d8bde/the_neverending_story_castle.pdf
    • https://s3.amazonaws.com/tetofamuxulil/60901167185.pdf
    • https://uploads.strikinglycdn.com/files/2be33a40-0382-4e23-861e-39eda875f780/judifu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010621.bin
a5e3bf28e50eb59624a6ab2d2d1119ccfc6a955e38d0536eebe3e7a1d2ceef3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 5096 bytes
font_01_sfnt_off00011768.bin
f844100ca5396758d159b431617a62880e928640b9fd219c543b37e15a91bef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11768 11364 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.