Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc41bcfa0db932c…

MALICIOUS

PDF

83.9 KB Created: 2021-04-05 15:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1984e5f5627fa2c2ce7a59b3ba74b5a7 SHA-1: 24d7d4062c09daba6b7565233f478b0451666b45 SHA-256: bcc41bcfa0db932c07e6347042c21510ba86ab3c53a503d9628d2a89649cc588
126 Risk Score

Malware Insights

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

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing. The PDF's content, though heavily obfuscated, appears to be a lure related to 'lks barisan dan deret' to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/award?keyword=lks+barisan+dan+deret+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474231/normal_5fef39f49a1b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471234/normal_601753400f592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_603fd90aac07e.pdfIn PDF document text
    • http://kabefuwo.22web.org/peter_pan_worksheets.pdfIn PDF document text
    • http://instapriz365.online/tusajoxundw1n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410679/normal_5fee3bdad4a88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408333/normal_6054f15f8b87c.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuwaxisiw/jhwiajg/best_wallpapers_for_iphone_5s_gold.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/jfigihY/17473764054.pdfIn PDF document text
    • http://geniusenglish.space/soxisayf0xy.pdfIn PDF document text
    • https://cdn.sqhk.co/munemuzabuk/iahbgeg/sigotidazevesafoku.pdfIn PDF document text
    • http://stassikorskyi.com/how_to_draw_cute_christmas_things_easyleiw0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuwarikufaz.epizy.com/cover_letter_template_for_unsolicited_resume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95bce6ed-69e6-4451-92df-f6dd8991c9f0/why_did_he_touch_my_stomach.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/75048755373.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/31516197258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/000d1ffc-69e4-4c0b-a609-b7f2c4b9c710/haier_split_air_conditioner_remote_control_manual.pdfIn PDF document text
    • http://notalopelovawu.epizy.com/stone_masonry_construction.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/gufade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f95b8cc-19a6-4bb1-abb5-b8a89f141cdf/how_to_fix_my_record_player_needle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d35f77ec-50c9-47c9-a260-a9966cbfda26/astro_a20_mic_review.pdfIn PDF document text
    • http://refewebol.epizy.com/betusinusoxinoxufufuvotib.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/27308955188.pdfIn PDF document text
    • http://vozotol.rf.gd/47790919640.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/electric_circuits_answer_key_physics_classroom.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_off000101c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C4 5148 bytes
SHA-256: 7360ac3a7628dfe52147fa337402d011503d2c1ce3bf073762637008cc692ccf
font_01_sfnt_off00011355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11355 15032 bytes
SHA-256: c129c33f4b065f517b60154f85f0b87231ef06bc7012279e2ba8110b6f80cb1b

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