Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7ac932336756bb…

MALICIOUS

PDF

95.8 KB Created: 2021-03-22 04:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6dd2ae753d972bb2473e5e0d39a1ab49 SHA-1: 7274cb20a1fbc1fa154680840bbf8ac051db7352 SHA-256: 6d7ac932336756bb7c0d64c5ae153612543cfda1598c9898ce5fa0b9f2926383
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it is a phishing lure, specifically mentioning an MFA or one-time-code harvesting pretext. The embedded URL, https://baarspo.ru/strik?utm_term=wordpress+user+registration+plugin, is flagged as an SEO redirector and likely leads to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://baarspo.ru/strik?utm_term=wordpress+user+registration+plugin PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445866/normal_5ff934cf871c8.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/R1AYgdu/66777217674.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386620/normal_5fcc4e4dd34fb.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/siibShf/python_dictionary_update_nested.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/bYhibjb/hydro_dipping_paint_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/bBjchOB/kingdom_new_lands_knight_statue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415534/normal_5febea8fb1048.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/gdDCRrI/brimonidine_gel_otc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_60110440e8c63.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
    • https://s3.amazonaws.com/tosego/83108182965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec148eb2-e005-4f30-af71-68e4d6ea92d7/jomezodisaz.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/netflix_mod_apk_premium_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2379e73-6cf6-4d35-bc08-b5945d204c50/she_stoops_to_conquer_entire_play.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/nawilufipolu.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/rusumeb.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/nasirona.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/what_do_you_eat_on_the_14_day_no_sugar_challenge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7fea932-7ad5-4a31-b38d-fb2a23505590/videjafubojabureji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33f0916-1ed4-49a9-be88-2b5d63fdbda5/6304811349.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/photo_to_avatar_photoshop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21420d5e-712c-4396-bcb0-55cc6266269f/15323009767.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/voxijobetevofejokukewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03817f7-7449-4169-a4b3-aa26483991c5/96390258564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe0cf9ba-7a12-47d0-8e32-7aad17963304/lebexugatufirabiwuban.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/vexuzimowesilel.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/xotudogi.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_off00012d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0D 5024 bytes
SHA-256: 56cae38250ec79b2da650ce6241cecf30e74f9ebe8f39d8a2f5c8c0d0d1b0229
font_01_sfnt_off00013e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3C 10868 bytes
SHA-256: 22fd8b75ba3f62ae10fe16ca70d67682386fe9cb83fa3f1038bf49b4f9036281
font_02_sfnt_off00016368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16368 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176