Malicious PDF — malware analysis report

Static analysis result for SHA-256 76dc313714999db7…

MALICIOUS

PDF

66.2 KB Created: 2021-03-18 07:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e67073833416ecf814fe387232e5c49f SHA-1: 238caf29d453465f8e01365954c4ef8008b404bd SHA-256: 76dc313714999db73a8610d47ce01cc731197c1959673b862d07b02e8aece08e
156 Risk Score

Malware Insights

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

The PDF file contains multiple external links, with a primary focus on 'https://jumiwimov.ru/strik?utm_term=how+to+connect+chamberlain+garage+door+opener+to+homekit'. The presence of a large number of external links, including a 'PDF link farm' heuristic, suggests a phishing or SEO poisoning attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=how+to+connect+chamberlain+garage+door+opener+to+homekit PDF link annotation
    • http://kaxiwemusemoj.mypressonline.com/fiduzexaresaxego.pdfIn PDF document text
    • https://medijomozu.weebly.com/uploads/1/3/0/7/130775841/b0d5936d4992.pdfIn PDF document text
    • https://metekazup.weebly.com/uploads/1/3/2/8/132815755/592724.pdfIn PDF document text
    • https://lojopozubog.weebly.com/uploads/1/3/1/6/131606756/5042113.pdfIn PDF document text
    • https://zidefiwemisuj.weebly.com/uploads/1/3/1/6/131606537/patinunajinipox_zilusi_dimekazomefipu_xadekujefiwazog.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/69901564396.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/is_toothless_real.pdfIn PDF document text
    • https://raguloduw.weebly.com/uploads/1/3/4/0/134041620/narol-nusefovowemep-tuwala-mokoledonokonuv.pdfIn PDF document text
    • https://darugagoremu.weebly.com/uploads/1/3/4/5/134588092/d194262757.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/ganubatebedoxez/bootstrap_4._3._1_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/how_much_does_it_cost_to_fix_a_stove_burner.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/bde_full_form_in_database.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/obsessive_compulsive_disorder_reading_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79ce614-b253-43e3-b52e-d9d4c4a08895/mikogarunada.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/13534981509.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/pediatric_pneumonia_treatment_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/taxavomawifevofivozava.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/ketinunasalujobisanozago.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/kiwojojugezedozikiwewosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d997d8e0-7ef2-4c14-b9f8-fdfe830f355b/how_to_write_an_essay_introduction_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a66b5d9-b520-4b2e-ad1c-6f2ba613c07c/islamic_names_meaning_in_urdu_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/nail_consultation_form_template.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_off0000c593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC593 5568 bytes
SHA-256: f5802f67964912eb2cfef412341e35af36883e1dc6d81aab05a2618db12b52b7
font_01_sfnt_off0000d85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85F 10100 bytes
SHA-256: 25d90300e055a28ae19b2fc06702c1d71f399c3efc37eb6be98cb72506b4a180

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