PDF malware analysis — malicious · 1f0aef22f12982a1

MALICIOUS

PDF

81.2 KB Created: 2021-04-06 17:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: a3201580d01af8b1680234d0a9597105 SHA-1: 059d929c045ac27b6d1af564070fb53381d661cd SHA-256: 1f0aef22f12982a1a06fdf6fa9dee031dfe67d5718f2331215dfa111dc1253f3

116 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan variant by ClamAV. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to prompt the user to make a phone call, a common tactic in tech-support scams and callback phishing. While no scripts were extracted, the presence of an external URI suggests an attempt to connect to a remote resource, likely for further payload delivery or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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=what+are+the+5+levels+of+leadership+jim+collins PDF link annotation
- https://cdn-cms.f-static.net/uploads/4379720/normal_6014fcbfa6148.pdfIn PDF document text
- http://korefubelexusiz.medianewsonline.com/gadanujidezemuxami.pdfIn PDF document text
- http://medtechnika1.ru/82904043697gbpio.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446649/normal_5ffa92f78a1f0.pdfIn PDF document text
- http://soldatskaya6.ru/ge_proficy_machine_edition_view_software_free_downloadfnfdt.pdfIn PDF document text
- http://pararapameso.getenjoyment.net/sample_affidavit_form.pdfIn PDF document text
- http://contact-git.top/99790668832svb74.pdfIn PDF document text
- http://vk-settings-change.online/86659801121n7i5p.pdfIn PDF document text
- http://kirakexig.mypressonline.com/gabriels_inferno_series_book_5.pdfIn PDF document text
- http://netewe5.xyz/ganunelewaxabigexedijiko105h8.pdfIn PDF document text
- http://kogemotuju.getenjoyment.net/how_to_cut_t_bones.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/nigimul/novewazuxoloriguroji.pdfIn PDF document text
- https://s3.amazonaws.com/woberiz/jandy_aquapure_error_code_lo.pdfIn PDF document text
- http://woxikajir.myartsonline.com/zegazu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e854c2e3-883b-4e22-b6cd-0caab5d5400a/is_it_wrong_to_pick_up_a_girl_in_a_dungeon_light_novel_16.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e0cfb0f0-8b52-4aa5-bb32-6588151d6482/nikon_coolpix_s6500_charger_cord.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/48c8b726-2c36-4532-a8cd-35a7efb05d65/asp.net_core_2.0_web_api_tutorial.pdfIn PDF document text
- https://s3.amazonaws.com/natewared/tofipige.pdfIn PDF document text
- https://s3.amazonaws.com/rakabexozu/bhagavad_gita_book_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b8831cd0-ad97-4eab-a12f-ab6abe9fc567/who_is_alive_from_white_christmas.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f0221690-6f34-449d-a274-a8c663348b2f/tojisemurelejik.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/649bff11-1361-4ab1-add9-9f2dda15c871/sekaz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8622491a-2035-45d5-a02d-53722f7fa279/kijewi.pdfIn PDF document text
- https://s3.amazonaws.com/zazelujeju/how_to_work_relion_prime.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f1ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1CA	5456 bytes
SHA-256: `068d5d939dc53734714875341314d96d0e150c8b52ee499c514ff32202e87379`
`font_01_sfnt_off0001044d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1044D	10720 bytes
SHA-256: `1e2b95a1b1f5589954261ecfc2a15f72ec88d565c14cc8e749312f99dbdea3ab`
`font_02_sfnt_off000128f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128F4	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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