Malicious PDF — malware analysis report

Static analysis result for SHA-256 634fe32b987484f1…

MALICIOUS

PDF

75.7 KB Created: 2021-04-02 02:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 311c91b685ed24e4c24289b52de0f703 SHA-1: 5213d19140b0139cdf0b907450e6d641a034fd51 SHA-256: 634fe32b987484f16a15d77aa15c729efeb2351a74f28c52d70b47b7bad00480
156 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 0.9997

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://crophysi.ru/award?keyword=carlos+castaneda+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/vatuliwa/JKigMBM/diledumuba.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/fjd9ght/mifinugokajitoturedoxow.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/4EhbIV8/umc_hospital_el_paso.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/w9gdBhg/car_dealership_tycoon_unblocked.pdfIn PDF document text
    • https://sojezuzifoko.weebly.com/uploads/1/3/0/7/130775518/lebifejofajawa.pdfIn PDF document text
    • https://cdn.sqhk.co/weridosotuk/dFNuaCt/gangster_town_vice_city_game_download.pdfIn PDF document text
    • https://gerudupox.weebly.com/uploads/1/3/2/7/132712596/505e49c8.pdfIn PDF document text
    • https://gixoxiri.weebly.com/uploads/1/3/4/7/134707295/30590.pdfIn PDF document text
    • https://xobalodag.weebly.com/uploads/1/3/0/7/130739625/5937289.pdfIn PDF document text
    • https://cdn.sqhk.co/kanemili/vEjjY3e/ultimate_horse_simulator.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/faluzotixupi/cervical_screening_test_patient_information.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/78041634445.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/angular_file_from_url.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d713cf-50a8-43d7-bef8-28d71fb5add5/milubila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55dc30a-d918-4250-a046-fdb07b6cd64f/64871954723.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/24770645045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfad127-1aa0-43da-a554-1cf2f89cb94a/94852237737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fe1ab5-844d-414f-a9e1-d1a5da4053fe/how_to_use_the_dyson_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f43eb77-7faf-4eee-9c92-4600aef69e66/dr_browns_sterilizer_microwave_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f3c112-2067-4f65-9ee1-0932d620e990/how_can_i_update_my_samsung_j3_software.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/mowuxal.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_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 5148 bytes
SHA-256: bea03c005fe67441ec0b173dbb6549c92f43e8fb2d2e14793fdc72d39e8ffe9f
font_01_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 10996 bytes
SHA-256: a3dbafdc0b0c432e7a8b04a9cf45864542490e046c747de609d4f0030a79dcfb

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