Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ed406893aa8816…

MALICIOUS

PDF

73.8 KB Created: 2021-03-12 18:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2fd020e3164e905b6380a07f30a6b052 SHA-1: c8f7a884417bd6a7596e7c6cb935ae7a6a0653fc SHA-256: 31ed406893aa88166babe20c157ab6e2158ed7e4a6517e0c7ee3c4def1f6eb80
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM'. One of the primary URLs, 'https://leonvi.ru/aws?utm_term=the+power+of+love+celine+dion+songtext+deutsch', suggests a lure related to song lyrics. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution through this link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/aws?utm_term=the+power+of+love+celine+dion+songtext+deutsch PDF link annotation
    • http://pojapusevipuzu.mypressonline.com/the_monkees_members_died.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/eijlZda/tarot_cards_3_card_spread_yes_or_no.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/heOVYhf/nozafifavofu.pdfIn PDF document text
    • http://desokore.medianewsonline.com/isomerism_classification.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/KRGPjaG/68865299128.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/widiku/shola_aur_shabnam_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/51812426099.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/35815614786.pdfIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_e609890dc5454eef8f818c631dfaf793.pdf?index=trueIn PDF document text
    • http://lafagelupuf.myartsonline.com/95795725292.pdfIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_19ad594e87fa404ba70c6f3eed3be563.pdf?index=trueIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_cc13ba5cab0542d59d1dde7c68c76c66.pdf?index=trueIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_1630abdf3d6441169916cd27bb0fcfdd.pdf?index=trueIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_69512fad5f2f4e33b90ee0615159607e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nabifovu/employee_consent_form_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/turtle_beach_x12_xbox_one_mic_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/authorization_form_medical_records.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D2 5256 bytes
SHA-256: 00cb901cc88d27000621cd92440086a9a0b9d4192d93cc8d2135d1b4486c227d
font_01_sfnt_off0000e7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 10544 bytes
SHA-256: 979a364878470b0181468dab90552e5dd86b75be8ef75f2236330233dcad45e9
font_02_sfnt_off00010b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B38 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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