Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b04a5b73f7a7f24…

MALICIOUS

PDF

89.5 KB Created: 2021-03-16 08:30:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9654fd65aa1e46eecd0904d3299bd059 SHA-1: b201e1ea27a9174b1402bc6f22eb34c274600c32 SHA-256: 5b04a5b73f7a7f248acaaa98c8a33506b89ad8423aecd41be901e2e10f266898
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of an SEO link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary URL, https://seumenha.ru/award?keyword=capacitor+capacitance+pdf, suggests a lure related to technical documentation. While no scripts were explicitly extracted, the presence of numerous external links and the ML classifier's high confidence score point towards malicious intent, likely for SEO spam or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/award?keyword=capacitor+capacitance+pdf PDF link annotation
    • https://cdn.sqhk.co/belexewuwif/VhjigjG/onnect_pair_matching_puzzle_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/ibBhakg/fisofupetunoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/SHje8Qf/find_friends_on_snapchat_by_email.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/jayFggd/61093117588.pdfIn PDF document text
    • https://cdn.sqhk.co/fezusife/ZWFHhaI/airstrip_four_font_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/1qX7tje/texas_holdem_poker_free_chips.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/kumasala/aarambam_songs_video_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/heat_capacity_of_calorimeter_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acab2485-dd7c-4fbb-92e5-c1edce07ba5d/9012896059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e4d864-e8d5-4622-89af-73fc1e1a61d5/usmc_book_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/how_to_replace_the_lamp_bulb_on_a_sony_wega_tv.pdfIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_152c6a025d9c487f929d697f8861a36e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figugipopar/4005175468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e5d2b7-fc89-4d49-8cb9-d896a1c91b59/31172648282.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/wifi_speed_vs_upload_speed.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/b_r_d_o_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/lupijusisogebegoruvebe.pdfIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_5a384f28c64240d9955861394bf393d7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d81a59-77ca-4054-9966-e4daedd0a0cc/are_hi_point_pistols_reliable.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/boy_girl_games.pdfIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_33fd13e5e9e0496b91fc2c600caac21d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuzamada/48172586453.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_off000122e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E6 4844 bytes
SHA-256: d62a8ad67f5fa26a737c07352b0b32ee359b07be937f42864192afeb3adcdebf
font_01_sfnt_off0001336f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336F 11000 bytes
SHA-256: 31ffcb1d6f544f0f78ad9450d7e2582e987d372f8ebd52fdcaaaa7cee818cc4b

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