Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c394d70862cf06…

MALICIOUS

PDF

86.7 KB Created: 2021-03-23 00:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f46b9d574900b5b2e17d9955a28e9ef0 SHA-1: 859ce185df090bf32382ea821824d96db2f3efbe SHA-256: c5c394d70862cf063d5e20ce8d7018bf52f1114965a8c6b7cf034b4468a24e20
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/strik?utm_term=manual+primeros+auxilios+bebes+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365586/normal_5ff897e7d32d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427093/normal_5ff1c5d8679a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_60307126be825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fd3cdf822fb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475864/normal_6023cf17e99b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481527/normal_5fc9f8bc7cf87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467586/normal_60532e2b5e23f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_603b4d773a38c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jonegukum.epizy.com/punolelujabuzazimerifuw.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/lijanad.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_fe9ff0aa241347088bdfec4f8f0a9cef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4593abff-d948-411f-91d4-3bd65b3dd9da/74996894558.pdfIn PDF document text
    • http://dinixebun.epizy.com/motorola_xpr_7550_bluetooth_headset.pdfIn PDF document text
    • http://jitoritobo.epizy.com/36438413048.pdfIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_88c80b83b2ec4bc2a2a048810b4b2b94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/zisaxiguz.pdfIn PDF document text
    • http://pidulenumasan.epizy.com/what_are_entry_level_data_science_jobs.pdfIn PDF document text
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_f34c9abd68b945bbb31650fc30d4f94f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/pakistan_army_song_audio.pdfIn PDF document text
    • https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_61f8d0dd7bf4466481e213e189d2467f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/pasosozexofetolutanif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f447f04a-c216-41b8-8309-530f2f5e8ad1/taylormade_r15_driver_adjustment_manual.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_off00011347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11347 5400 bytes
SHA-256: 683875b3516099ffa36dcd9638294d961671b74f264459f3c4d9d7f6ecc30d2e
font_01_sfnt_off00012596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12596 12292 bytes
SHA-256: ff9324620ec0ae8bafd50a8e1737b516f5c8b17f6253eaf8f24be6446cf3cb0e

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