Malicious PDF — malware analysis report

Static analysis result for SHA-256 7441277fd114d9d2…

MALICIOUS

PDF

79.9 KB Created: 2021-05-04 08:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 79eb9e3b507405988721b55150c9cca6 SHA-1: b410c6e85b6aeba5785c4f0d8c82266a0818110f SHA-256: 7441277fd114d9d28daa2c86f040a23d744c61d53251b5183c15f49d963b11c0
166 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The 'SE_MFA_LURE' heuristic indicates it attempts to harvest credentials or session tokens by impersonating an MFA or one-time code prompt. The embedded URL 'https://druttle.ru/strik?utm_term=how+to+find+my+hotspot+password+on+samsung+j7' likely leads to a phishing page, as suggested by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic which points to a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://druttle.ru/strik?utm_term=how+to+find+my+hotspot+password+on+samsung+j7 PDF link annotation
    • http://about-fb-support.com/driver_hp_laserjet_p1006_para_windows_7_32_bitsykgvs.pdfIn PDF document text
    • http://xibesofene.22web.org/bujunepugotolelavenatex.pdfIn PDF document text
    • http://verifybadgesbusiness.com/xawibilivatuni09uvn.pdfIn PDF document text
    • http://instahelpforbusiness.com/vadavugovexujoxoruzwig4o.pdfIn PDF document text
    • http://eferevole.com/how_to_keep_dermestid_beetles_warmy2pcv.pdfIn PDF document text
    • http://covid-19online.site/what_are_the_four_earliest_theories_on_the_origin_of_life2d79x.pdfIn PDF document text
    • http://ens-pictures.ru/yellow_belly_slider_care_sheet7g4qb.pdfIn PDF document text
    • http://disconto50.info/40472281126h8bdx.pdfIn PDF document text
    • http://zawugexoj.22web.org/17760606330.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/tarizirefevifab/44719836954.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/21040049707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8184cec-77ac-47c2-8e48-2ec175c7819a/21006253435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee029a2-abed-44c5-b056-04b1b5590958/saa_green_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3ee95c-d7f0-4407-84c0-5a62491618ea/fubujididigeto.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/incidente_campoformido_23_febbraio_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/ffxiv_act_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/71160771327.pdfIn PDF document text
    • http://rozixan.rf.gd/incident_report_example_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/506140e5-98fe-4306-a799-0f943e0f32d4/research_methods_in_psychology_morling_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ef10a0-45c2-4de2-a639-9164abd148f4/frigidaire_fad704dwd_energy_star_70-pint_dehumidifier.pdfIn PDF document text
    • http://lobaman.epizy.com/plague_doctor_mask_pattern_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a4b149-24fb-4b04-9206-68f3e3a89fb5/will_there_be_a_monster_in_paris_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1993c596-1779-4914-ba35-c53b45ca1520/42384005260.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_off0000eb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3F 5496 bytes
SHA-256: 18551603e39a43cc460c47b4548d145be6f901ee6f7703921fc7a30b28ee61a1
font_01_sfnt_off0000fdda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDA 11048 bytes
SHA-256: a49c7d1ddf83756fb91710ee647bce024a23d4ac70a2e05f6d00233f82de7694
font_02_sfnt_off000123b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c