Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc379d12abe5773c…

MALICIOUS

PDF

79.7 KB Created: 2021-04-03 02:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 85590c46acfacea70ae5d628096d6d8a SHA-1: fa1564b72f4177c86cf815bb37f10d3b3c9f38dd SHA-256: fc379d12abe5773c0d6a88d39d1ae6240d53aa63c5d697d3682df397695e4619
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'black and white formal dresses australia' to disguise the malicious intent. The presence of external URIs and link farm characteristics indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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 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/123?utm_term=black+and+white+formal+dresses+australia PDF link annotation
    • http://wefufivubulal.medianewsonline.com/74707870886.pdfIn PDF document text
    • http://megarafulosibef.22web.org/sodulixipotigixe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501963/normal_6050014cce641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464861/normal_603d124d418d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501057/normal_5fe147326863e.pdfIn PDF document text
    • http://pupigojoniru.mypressonline.com/63637659043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378404/normal_6046fffd51f30.pdfIn PDF document text
    • http://nuzenupezebep.iblogger.org/39220729026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_6065004f6d7c8.pdfIn PDF document text
    • http://jebororaf.iblogger.org/stay_at_home_mom_daily_schedule.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/muzixiroliwigimuwosak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fetekovabu.onlinewebshop.net/92494940036.pdfIn PDF document text
    • http://xevupabiko.rf.gd/21620360852.pdfIn PDF document text
    • http://kexasejuwodeji.epizy.com/74156610516.pdfIn PDF document text
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_68540973bc2e4757b45cba8876753965.pdf?index=trueIn PDF document text
    • http://vojalaranugun.epizy.com/32047170371.pdfIn PDF document text
    • http://pomigipasa.epizy.com/debagen.pdfIn PDF document text
    • http://disoked.epizy.com/99182678482.pdfIn PDF document text
    • http://kivekedifewu.rf.gd/epson_wf_2630_scan_to_usb.pdfIn PDF document text
    • http://buzumigasox.myartsonline.com/69699530521.pdfIn PDF document text
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_2b89098078bf4db2b44085ef8681c690.pdf?index=trueIn PDF document text
    • http://dopozidimosopa.rf.gd/96071816549.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_153398869bcf4905810ca0486cf3ee7b.pdf?index=trueIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_5b83db3d98ea49b5adbc2f424917bdfe.pdf?index=trueIn PDF document text
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_d8954695905f422d825149fcc7128d8a.pdf?index=trueIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_92b6c0025d42424b9960444bce1e58e5.pdf?index=trueIn 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_off0000f821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF821 5464 bytes
SHA-256: 69502392c8f4502fff9ac63a17ccb63ddc73cd766545ff4fe10cc024e501b308
font_01_sfnt_off00010aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 10760 bytes
SHA-256: 6a851ad2b5023daff6bbe0c8a67e63ff4b5bc8ac640ddef99b801378d6028d7f