Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdd601e43b85997…

MALICIOUS

PDF

71.0 KB Created: 2021-04-01 00:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: daf27314b5f6b1f1e2c0baade052079c SHA-1: f62e0897b4b4543a39e02dea0d42beac0823af65 SHA-256: 0bdd601e43b859978cbc39bf6b6bfcc33e44fdbd9bb5a11a6f31f75a5ff88ea4
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a large number of outbound links, with one pointing to 'https://ponafet.ru/strik?utm_term=hp+laserjet+p1102w+manual+feed', disguised as a printer manual. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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://ponafet.ru/strik?utm_term=hp+laserjet+p1102w+manual+feed PDF link annotation
    • http://zanovekolasin.mywebcommunity.org/46861628588.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/5400077.pdfIn PDF document text
    • https://veralekixa.weebly.com/uploads/1/3/1/0/131069874/vikadej.pdfIn PDF document text
    • https://dimitosakusefix.weebly.com/uploads/1/3/4/6/134631941/nusex_pofidozamed_dijavuliguv_besimujuw.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/fitolopobazizujoto.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/wutiv.pdfIn PDF document text
    • https://nakagikirowi.weebly.com/uploads/1/3/2/6/132695306/d308a38fe.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/critical_race_theory_third_edition.pdfIn PDF document text
    • http://duwudivusupo.mygamesonline.org/best_female_names_in_ethiopia.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
    • http://zejibanunepi.myartsonline.com/plot_of_storm_kings_thunder.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_feb75aa5b6ae44268860c68abbd0f051.pdf?index=trueIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_e1e0a8d94c9749bcb2f11ece48847f63.pdf?index=trueIn PDF document text
    • https://74df6fe0-557b-4e47-8461-f2df536053d0.filesusr.com/ugd/4dcf4e_3aeb3282fc7e4bca980c63f07968f370.pdf?index=trueIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_8447e6b9e0cb41f69bb67880852480e7.pdf?index=trueIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_f41b85d014b4474e8207cba60243706a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/540ae259-4734-4d12-8d7e-092bfff7fd76/how_to_bypass_icloud_activation_lock_for_free_ios_12.pdfIn PDF document text
    • https://9dc8676a-0e58-44ee-a512-e339c7094702.filesusr.com/ugd/7c0652_98f7ba8bea6b4099a290879809d788f1.pdf?index=trueIn PDF document text
    • https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_e699e5dc6dd948a6a82c3efbb40b43ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef2dee7-d3f7-4e89-a1bf-16130b814a5a/tipanovif.pdfIn PDF document text
    • https://d3919fa5-c020-464c-a773-72e456e10464.filesusr.com/ugd/29136f_fe377e8fda704be29144fbe131e5f644.pdf?index=trueIn PDF document text
    • https://abf133a7-37c0-4616-b653-d99fd306bce3.filesusr.com/ugd/5c8236_1661b9ec3e4141669bd21f3b9949cdf2.pdf?index=trueIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_d8b21ea0674c4144869e450ebe9a5714.pdf?index=trueIn PDF document text
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_0d55f739e11d4b37ba2db8bdc6493a20.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE2 5368 bytes
SHA-256: 4add429d0bb1263dd643d5afdc8de8fa8b764a348b2dec766536344fe3a2f339
font_01_sfnt_off0000de18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE18 10168 bytes
SHA-256: c0485b94ecf0d6b108a514378661501f58783cb9637cfc65ebb8db3ca6bf6802
font_02_sfnt_off000100e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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