Malicious PDF — malware analysis report

Static analysis result for SHA-256 517dd8c4d2a0649b…

MALICIOUS

PDF

102.8 KB Created: 2021-04-06 02:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e3f29005a87f67a8fe70f17bc47f078 SHA-1: 82bc0ae24ed6fea9db50a60d471b9e6d84dbc62e SHA-256: 517dd8c4d2a0649b4f1e1292b9274bff4aba4e211643bf594cb45535c26ab137
156 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or a method to distribute further malicious content. The primary malicious URL identified is https://golowaki.ru/123?utm_term=antecedentes+del+alcoholismo+en+los+jovenes+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=antecedentes+del+alcoholismo+en+los+jovenes+pdf
    • https://xiwupegolowiba.weebly.com/uploads/1/3/1/6/131606046/tamuwu.pdf
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/4d084.pdf
    • https://pijawofixogut.weebly.com/uploads/1/3/4/0/134017865/lujajasit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizitifowubux/job_description_details_template_doc.pdf
    • https://uploads.strikinglycdn.com/files/8bfb99b3-4398-444a-9938-0a5d96f3bec3/wings_of_fire_graphic_novel_4.pdf
    • https://uploads.strikinglycdn.com/files/540cc023-2093-49ed-be26-120037d59828/vixixebibo.pdf
    • https://uploads.strikinglycdn.com/files/5b2f9283-e6e1-4ccf-a6d8-8229f699b276/devuligugan.pdf
    • https://s3.amazonaws.com/boxalewijim/mitojudonamotajigef.pdf
    • https://uploads.strikinglycdn.com/files/d6eb5b52-2fcb-4928-8a13-bccdd7836368/metodologa_de_la_investigacin_de_hernndez_fernndez_y_baptista_en_su_sexta_edicin.pdf
    • https://s3.amazonaws.com/zowejunef/canary_wharf_college_school_uniform.pdf
    • https://uploads.strikinglycdn.com/files/b757afa5-1b68-436c-aad1-a09d052f49d9/5085996318.pdf
    • https://s3.amazonaws.com/baxekojojexusol/leading_safe_certification_exam_answers.pdf
    • https://uploads.strikinglycdn.com/files/76569854-bafe-449c-bf2d-9f61e67d9074/the_game_of_life_and_how_to_play_it_book_review.pdf
    • https://uploads.strikinglycdn.com/files/32f64efe-ac44-4dda-a70e-cf21c668b71b/70939010451.pdf
    • https://uploads.strikinglycdn.com/files/42dd0373-376d-483e-a5b9-a1962c923a09/2011_dodge_avenger_troubleshooting.pdf
    • https://uploads.strikinglycdn.com/files/27c2a643-a229-4bee-b1e9-1ca2a07c1e11/texas_instruments_ti-84_plus_ce-t_python_edition_games.pdf
    • https://uploads.strikinglycdn.com/files/3b1e9128-31cd-4c9d-9d96-e2ee50ee3b9e/zononajakulegenime.pdf
    • https://uploads.strikinglycdn.com/files/35606a47-e17e-4c55-a782-7dc9b5dd55fa/lafepusudifimebakun.pdf
    • https://uploads.strikinglycdn.com/files/f1054bf9-a36a-4614-a153-bb76c0884ea4/honeywell_quietset_fan_stopped_working.pdf
    • https://uploads.strikinglycdn.com/files/3e0dd081-ad7b-4005-a230-e7a8be6c7a5b/does_detoxing_affect_your_skin.pdf
    • https://uploads.strikinglycdn.com/files/83f6fa90-cccd-4621-9f25-0a56478aba49/mr._coffee_-_12-cup_coffee_maker_-_black_chrome.pdf
    • https://uploads.strikinglycdn.com/files/7a5229c6-357c-4da3-a121-71352f2447c4/flowermate_v5.0s_pro_mouthpiece.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000152d2.bin
aca2491bdf71598996cdfff7191512ce55c79527244439e5990febd2998e1d4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x152D2 5424 bytes
font_01_sfnt_off00016533.bin
23681e35d1bf5c5b85bcfe856e79577d4dc8bf591db60a8d34a84732716be624
pdf-font-stream PDF embedded font (sfnt) at offset 0x16533 11596 bytes