Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bc5663805f6d6d…

MALICIOUS

PDF

87.2 KB Created: 2021-06-09 16:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a5f47bf6de1294189eb2f8dd1afdf232 SHA-1: 164e43c3612a99a82092eb5423c7ea2f62a73005 SHA-256: 24bc5663805f6d6d13a5941c97b1395f8220c96de410b4ffbe2a4271e4cbba00
126 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a URL with a 'call of duty mobile' search term, strongly suggesting a phishing lure. The ML classifier and ClamAV detection further confirm its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect users to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://chcial.ru/pbw?utm_term=unlimited+money+call+of+duty+mobile PDF link annotation
    • https://fopizute.weebly.com/uploads/1/3/4/3/134315067/witiwudoxe_zojuxizepamuvu_lizevuvef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_6041a4a39828b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_6038f0d5b327a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446158/normal_5ff65bd1a98bf.pdfIn PDF document text
    • https://riwitasaroxaga.weebly.com/uploads/1/3/4/6/134656256/sixexamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_5fd7c868c4b9f.pdfIn PDF document text
    • https://semizafug.weebly.com/uploads/1/3/1/8/131871859/8818514.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483873/normal_5ff9068a7d1c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_604d18e25eab3.pdfIn PDF document text
    • https://teriwogawuf.weebly.com/uploads/1/3/2/8/132815342/4e96a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450256/normal_603f280a30a56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ab3236-e1e6-4ba7-8d38-586052dd6a46/jurassic_world_evolution_dinosaur_stats_spreadsheet.pdfIn PDF document text
    • http://gebetedoke.pbworks.com/f/93989929562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97549ed-a577-4a89-bda7-3daafafa0c12/rijemiwexawo.pdfIn PDF document text
    • http://popuwepux.pbworks.com/f/start_your_own_corporation_drive.pdfIn PDF document text
    • http://zeranagaro.pbworks.com/w/file/fetch/144676434/88806728939.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144469932/how_to_refill_playtex_diaper_genie.pdfIn PDF document text
    • http://tabujaz.pbworks.com/w/file/fetch/144935613/jemetenenajanatoxirekof.pdfIn PDF document text
    • http://xinunubaz.pbworks.com/f/icd-10-cm_coding_guidelines_made_easy_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f137a4a7-e006-4f6f-8120-52feb4e024fd/m-audio_fast_track_mkii_drivers_download.pdfIn PDF document text
    • http://daridameku.pbworks.com/w/file/fetch/144639510/athlean_x_workout_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f7c78f-b6b2-45e5-9581-7be573adb3b5/the_darkest_minds_trailer_music.pdfIn PDF document text
    • http://bujolajoxek.pbworks.com/f/xetesepasu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E0 5060 bytes
SHA-256: 4319651ff410da14e70e23fe88f6fcaee9573eb8df4524e06c84079c5b46dc01
font_01_sfnt_off0000f47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47F 5128 bytes
SHA-256: e7b1330ce827983d52ac16c74c604fcb12ce794fec5f96739a54eeb35eeb8c84
font_02_sfnt_off000105ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EF 19368 bytes
SHA-256: 534fe94e11cd7fcceec20d7bd9accb6e653e5860b34285cdf4740ce4a7fb97a1
font_03_sfnt_off00013689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13689 16452 bytes
SHA-256: 1039fdea351b2367cc0d03c2a057dfde7b1d354959aeac8fd0e1353965670f67