Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b7a58c2bcef5e3…

MALICIOUS

PDF

98.8 KB Created: 2021-05-09 03:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 94919d676438d475e9320e4c62fd4a8a SHA-1: 860e65391d6c1ff4fef3908f17e518745a67404b SHA-256: 09b7a58c2bcef5e3b7644dc998456da4579a9d67d2571012f6b551b80f512a5a
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 intended to direct users to malicious sites for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users through link farms, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://vilenefex.ru/strik?utm_term=win+worley+obituary PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470553/normal_5ffc7f9d0e3d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_6034c2d39f2fb.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/nupotegurijewim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454182/normal_604e4c42dceeb.pdfIn PDF document text
    • https://woluxivevarot.weebly.com/uploads/1/3/4/6/134672831/6886457.pdfIn PDF document text
    • https://xasedomag.weebly.com/uploads/1/3/1/0/131071243/xokipigusoje.pdfIn PDF document text
    • https://wufikasuruxur.weebly.com/uploads/1/3/1/6/131636700/436570.pdfIn PDF document text
    • https://zitavumerut.weebly.com/uploads/1/3/4/4/134465292/gizafova-sivasipeporefoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fe6173c99f3f.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/kefodek/al_quran_al_karim_word_by_word_translation_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/35098094161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2ab9a20-6600-4a9e-bded-40330da125b1/zoom_handy_recorder_h2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/sql_injection_php_form.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/xidanikezigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/779b45fc-f8bc-48e5-9812-758dac650d8d/famobutafimexetuxevot.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/cicerone_beer_server_study_guide_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac36863e-f453-40c0-8307-67463766fdb8/nursing_diagnosis_for_hypertension_example.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/32385246872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b773235-938d-43aa-8161-24c623ff3580/pretty_little_liars_theme_song_british.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0cf2a9-fa77-46f7-9b4b-8691688ddcfd/xuzomusarijinusotumerux.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/tukaxuwilobosawulivoxolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17dd2ea1-1953-4717-8711-7bdd4bd3823e/how_long_do_you_have_to_notify_the_dmv_of_an_address_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68133ced-4eb9-40a7-bb74-22343302db34/how_do_i_get_the_radio_code_for_my_2007_honda_accord.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/characteristics_of_a_transformational_leadership_style.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/ninja_professional_1500_pitcher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039bffac-7ea2-4a09-8259-3503ea5a5538/2010_chevy_malibu_headlight_fuse_location.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_off00014681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14681 4848 bytes
SHA-256: 2406033bd139fc3c4f9a8781bb3a0ed70323a89657d0446ddfe1f80e921dcf8f
font_01_sfnt_off0001572a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1572A 11312 bytes
SHA-256: 5edd2483b62f492691563d80adbb0cbc84291b44a0590a1009cfdb0be10a15bb