Malicious PDF — malware analysis report

Static analysis result for SHA-256 2948375ac06be8e9…

MALICIOUS

PDF

78.5 KB Created: 2021-05-01 08:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 32724557450bb8aa38105f8804ea746f SHA-1: 1cf51d51325b1abad08fd0a47c7d66a38d176356 SHA-256: 2948375ac06be8e975cc32042cd46175d092c8134ec3b5af86471cfa48b04c01
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=why+sensor+light+stays+on PDF link annotation
    • http://meriline.store/30021296642k7er8.pdfIn PDF document text
    • http://vewefoma.getenjoyment.net/nift_2020_question_paper_download.pdfIn PDF document text
    • http://lukiduxipapep.mywebcommunity.org/27177418801.pdfIn PDF document text
    • https://betewobinolatid.weebly.com/uploads/1/3/4/7/134756009/2c74bd817c89.pdfIn PDF document text
    • https://sajakuvidosub.weebly.com/uploads/1/3/4/4/134496924/884d7038de5e5.pdfIn PDF document text
    • http://autoport76.online/jijiwotonapibinugasevefumrbni.pdfIn PDF document text
    • https://dejibifugav.weebly.com/uploads/1/3/2/3/132303230/5798435.pdfIn PDF document text
    • https://jiwebatije.weebly.com/uploads/1/3/3/9/133997557/zupigubemu_kuxapusumuf_masuv_tuvujigasinez.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/33098073130.pdfIn PDF document text
    • http://vofufime.mypressonline.com/pezufanevunok.pdfIn PDF document text
    • http://scoretdho.best/5_celestial_bodies_in_our_solar_system290jt.pdfIn PDF document text
    • https://werirubiteda.weebly.com/uploads/1/3/5/9/135972418/dadaa9962.pdfIn PDF document text
    • http://item-mask.top/gevalia_coffee_maker_free_offerf60n4.pdfIn PDF document text
    • https://vaxevadokipab.weebly.com/uploads/1/3/4/6/134610393/3308097.pdfIn PDF document text
    • http://tryporte.xyz/precalculus_right_triangle_trigonometry_worksheet59zwo.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/thyroid_gland_physiology_pptvrae6.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/tatotujarapaje_kepizofunidejab.pdfIn PDF document text
    • http://popularchoice.space/finugon7ukdj.pdfIn PDF document text
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/4793450.pdfIn PDF document text
    • https://tawixepew.weebly.com/uploads/1/3/0/7/130739069/9d853c49c71d54f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a3abd3d7-f7e4-4b0c-86b7-ec358d8c805a.filesusr.com/ugd/97a3b3_817e684ce7e242b89c443a6561666b51.pdf?index=trueIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_3feb053d489c43d2bdb50b0bd18e99b1.pdf?index=trueIn PDF document text
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_1aa386bcc92748c7a26534e958a6cbe1.pdf?index=trueIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_2dcbc48c822e460fbf62a022924c522c.pdf?index=trueIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_48254041395845b8ad97a1aee7310ef8.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_off0000f4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CD 5060 bytes
SHA-256: 333863395596a133fc099550f1fca18a5a370d96de25c9885f2a37690d26f797
font_01_sfnt_off00010612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10612 11292 bytes
SHA-256: 9d2dba9016ee98e6bffab96527075f117255001fad3d0f4a518731d619ff6776