Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfbbbb622824a99d…

MALICIOUS

PDF

78.7 KB Created: 2021-05-20 20:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: cc21e24258a0caf7e61b20820aa564fd SHA-1: 9cd6ae1a721922662bf95fccf47cfe3ca636b1b4 SHA-256: cfbbbb622824a99d5dff3460152d640fa27edd6140f1a66184801223be2c68cd
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a significant number pointing to external sites, indicative of a link farm or phishing attempt. The heuristic PDF_SEO_LINK_FARM specifically flags the presence of a mass external PDF link farm. While no scripts were directly extracted, the nature of the embedded links and the ClamAV detection suggest a malicious intent, likely to redirect users to potentially harmful content or phishing pages.

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://golowaki.ru/strik?utm_term=define+the+anointing+of+god PDF link annotation
    • https://xugoxokolo.weebly.com/uploads/1/3/5/3/135392162/9799361.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/walaxatexumilej.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/0cdc43a4-23f3-4fa6-a09d-03f591e306fa/nikon_coolpix_s6000_price_in_bangladesh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fd92fe-3c19-46a0-be13-4ead681c6903/toro_recycler_22_190cc_personal_pace_lawn_mower.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/free_printable_mailing_labels_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/st_aloysius_college_adelaide_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/anandam_full_movie_2001.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/xetawod.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/navigators_topical_memory_system_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a915b459-5c94-4b43-baa0-605790232b04/fonejotefifuwelemuzitited.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/560db451-c416-4feb-9d19-217ad0bae160/53078475402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b737a9-f150-4fac-b92a-a840376a0d65/92942257356.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/their_eyes_were_watching_god_chapter_7_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/how_to_add_mp3_to_iphone_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90976942-6025-44ed-982a-7354a52c45cd/pixel_movie_songs_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/horned_baboon_tarantula_care_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/926534f2-2e9d-4536-818d-d2da7722da43/char_broil_red.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/how_to_stretch_shoulder_pain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02db9c1-deb9-45fc-b710-385aa3cddc78/zarononidozosiwozara.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_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 4860 bytes
SHA-256: c010d7fcd6340a5d36e2672f86e180414d2702cfc2bdf21cadda6dd54e382eb7
font_01_sfnt_off00010666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 11136 bytes
SHA-256: 5d66906272a939e4d5a0e11945eb24e76eda5fd76feb884aa1ee968bb1933925

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