Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c45a89d3ecea1a…

MALICIOUS

PDF

68.0 KB Created: 2021-03-15 21:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4573091466f62963f7f4050deb4d280b SHA-1: c94dc56c195306312ae4bbbeb0f631630ce0583c SHA-256: a7c45a89d3ecea1ae0bf9e57a54f7a84adafa95900e9853e05dcaddd18192581
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a mass external PDF link farm, with one of the primary external URIs being https://jumiwimov.ru/award?keyword=calculator+magic+tricks+pdf, suggesting a lure to disguise malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to lead users to external malicious content.

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://jumiwimov.ru/award?keyword=calculator+magic+tricks+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490129/normal_5fdad4934b2df.pdfIn PDF document text
    • https://mavusuwavonim.weebly.com/uploads/1/3/4/4/134493404/pemosodexopafo.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/where_can_i_buy_replacement_stove_knobs.pdfIn PDF document text
    • https://tarebizadutobi.weebly.com/uploads/1/3/4/3/134310067/7629050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377905/normal_5ff7a18229d26.pdfIn PDF document text
    • http://degifutuv.scienceontheweb.net/94366132256.pdfIn PDF document text
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/zetiroduvibukazewa.pdfIn PDF document text
    • https://sinekamawo.weebly.com/uploads/1/3/0/7/130776883/5857267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413121/normal_5fe22972d7bdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_60371633d6d13.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/ninazarila/tezokawovifal.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/channel_9_guide_adelaide.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/52321873719.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/kinetic_molecular_theory_reading_assignment_chemistry_answers.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/zejulebuzajul.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/adverbs_position_in_a_sentence_exercises.pdfIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_abdeaf559f6a474ca0d0f3b9bb4ed705.pdf?index=trueIn PDF document text
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_9929c9f009d24b82a9b2a3ea418d0d9c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/wujawuranakexemafenexadal.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/69547939914.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/babeje.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/gozikekuf.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_off0000cbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD1 5444 bytes
SHA-256: 225b921cbc14f55f7b0dc2ece2234dc3269933c19dab6c2f3114050778f78b5f
font_01_sfnt_off0000de3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 10652 bytes
SHA-256: f7fcc331cf855d23e213c6f58ea4b4cdeb5185be3b48a5a74ff77056aacb3787

Open this report in the interactive analyzer, or submit your own file for analysis.