Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c7e3566e1b6841…

MALICIOUS

PDF

88.5 KB Created: 2021-03-14 06:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 39d377b26452546627a07599e200ace2 SHA-1: 29b5dbb446e45c52251f5ed16def3824279de2dd SHA-256: a2c7e3566e1b6841521892cd3958666e48bab9fd6ec34eae6d47dc7551cdb4be
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URIs, including one pointing to 'lozipotod.ru', suggesting a redirection or download attempt. The presence of embedded URLs and the PDF structure indicate it's likely used as a lure in a phishing campaign, possibly delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://lozipotod.ru/strik?utm_term=knots+book+r.d.+laing+pdf PDF link annotation
    • http://judejoz.iblogger.org/mandated_reporter_definition_washington_state.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/hhjO0Ng/7283194809.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365582/normal_5ffa773a3de1f.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/phca8HR/all_cast_software.pdfIn PDF document text
    • https://cdn.sqhk.co/pajubopolak/hchahT2/teachers_college_press_jobs.pdfIn PDF document text
    • http://dejenenipanoz.22web.org/mv_bts_make_it_right_mp4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412583/normal_5fde39dea5502.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/cBihgg5/tuxukixefupunelebor.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/piwegekovepebamizum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_602457139059a.pdfIn PDF document text
    • http://saniwigudovo.scienceontheweb.net/ligusotolate.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/dQjb6Bo/galaxy_watch_active_2_lte_battery_life.pdfIn PDF document text
    • http://guwusovonolus.iblogger.org/gitelatopid.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/lukirigirijojilavuvik.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/togig.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/library_public_relations_and_extension_activities.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4220bc7-9fcf-4b66-bd4c-60ecb1fa7cc6/nifabenifanizanajob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57732227-f555-42a0-a792-bef35b6e68de/95072377083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/affdb6cf-e56e-4dcb-af75-0fd7d8fcb284/dexulaz.pdfIn PDF document text
    • http://wuwatomugexove.epizy.com/nejudosanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2457138b-a38e-4ea0-ac9b-4195fea71131/qu_hacer_en_la_ciudad_de_mxico.pdfIn PDF document text
    • http://bajewilogofiro.epizy.com/gantt_chart_daily_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6293e5-67fd-4654-abdf-3ce7f9496fb4/99355333009.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_off00011bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD6 5412 bytes
SHA-256: b3496683ca679cafdb1c2c1f8cd19a8df6332985e846fb3d7e32815d8bdc7ea9
font_01_sfnt_off00012e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E54 11260 bytes
SHA-256: 76dbc9e906f4f38328fdf9b5edbdc3856413cf2f0b46d41b4820a02d9bbe19b2

Open this report in the interactive analyzer, or submit your own file for analysis.