Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e358c1c4fdc8abb…

MALICIOUS

PDF

79.5 KB Created: 2021-04-29 18:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2d2f97bac283a6eee42178a0eace90f8 SHA-1: b3312944b5458ef332e74a2bcffb19aecab3644d SHA-256: 2e358c1c4fdc8abb640a941ee3233da08fb3d08d1b23d57ede78828f36942a18
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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.
  • 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://nipisod.ru/strik?utm_term=download+photoshop+cs5+full+crack+32+bit PDF link annotation
    • http://gilelugojes.iblogger.org/85924688830.pdfIn PDF document text
    • https://saworajopasu.weebly.com/uploads/1/3/0/7/130775294/lewexovim.pdfIn PDF document text
    • https://cdn.sqhk.co/mojesoje/jaTjeV9/kapukilorapa.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/u1Limjc/godville.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/IZkwFie/how_to_cook_turkey_bacon_wrapped_asparagus.pdfIn PDF document text
    • https://modovepa.weebly.com/uploads/1/3/4/4/134464072/tusonuwuzewivapi.pdfIn PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/9068957.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xotesevuves.epizy.com/obama_quotes.pdfIn PDF document text
    • http://salorejim.epizy.com/apdcl_recruitment_advertisement_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/74070840061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c79ed38-1e8f-431d-b7a8-748560a08678/dazebevojege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c987cf-0946-4796-a837-e4daf7c47979/duvet.pdfIn PDF document text
    • http://vibodox.rf.gd/bolt_nut_standard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2d6a75-2434-4199-9798-6c5e7852cff8/41193580161.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/calikusu_english.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/is_the_trials_of_apollo_series_finished.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5060643-b0e4-409f-a5b5-e07d8c506858/where_are_the_harry_potter_movies_streaming_after_peacock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84630955-3187-47a9-861b-64b78a60338e/la_ciudad_y_los_perros_resumen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 5720 bytes
SHA-256: cfea49d28313f754229a70a2d0605e4ed94350f6a11e9cc21ca74b4e62ae32f8
font_01_sfnt_off0000fef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF8 9784 bytes
SHA-256: d4591571fc837066c993ef7b86ef73aee691ee758d38a856e947dda44aea1e62
font_02_sfnt_off0001207c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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