Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ef347ee69e19ca…

MALICIOUS

PDF

74.3 KB Created: 2020-12-27 17:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f1a3ee680f3f1106a3ce201ad956c721 SHA-1: 906f5e0e3125d8cbeb66576ba72965f5764d03ae SHA-256: b0ef347ee69e19ca0de194bfb2f537217c5fd7b2b0e3fb19390b82d009b44d8a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM' suggesting a tactic to drive traffic to potentially malicious or phishing sites. The embedded URLs, such as 'https://traffset.ru/aws?utm_term=1+billion++android+games', are likely part of this scheme to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=1+billion++android+games PDF link annotation
    • https://cdn.sqhk.co/xezojutatow/ioN3jbI/xenapop.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/AgifgdS/beli_pulsa_dengan_gopay.pdfIn PDF document text
    • https://lotefexikig.weebly.com/uploads/1/3/4/0/134097130/03e4af673e5a.pdfIn PDF document text
    • https://cdn.sqhk.co/kabutijefix/Unnd72x/download_game_robot_shark_cheat.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/2503574.pdfIn PDF document text
    • https://cdn.sqhk.co/zowesifona/jheqhhd/7016129483.pdfIn PDF document text
    • https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/kamotaduwofekut.pdfIn PDF document text
    • https://cdn.sqhk.co/jomurozop/XKicVwG/skyrim_alchemy_health_potion_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/hccjjhj/friend_finder_networks.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/0b8c857c-82da-4b1f-8142-ed76142d304c/sasefewiboxidedudaxum.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/payaliya_bajni_lado_piya_song_hdvd9._com.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/company_of_heroes_2_campaign_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/how_to_change_password_on_asus_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc2ee5b6-8dae-4430-ac75-6411d1840aa3/sedona_to_phoenix_shuttle.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/police_background_investigation_internet_history.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_off0000e728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE728 5244 bytes
SHA-256: 9ef9b56dfbd49e2338015fabff2c3d9671d35fdc6a9d49f6735d9c12ebe26b99
font_01_sfnt_off0000f8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E2 10252 bytes
SHA-256: f294f017d4d8759e94abba79b7d43df25547db87f647a1cb19704bdecf96aa64

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