Malicious PDF — malware analysis report

Static analysis result for SHA-256 9582ff204798997e…

MALICIOUS

PDF

83.2 KB Created: 2021-04-04 05:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 14092770cd543966324f1405852902eb SHA-1: ba71415054848260c20dfa349ba432ffe6f14eaf SHA-256: 9582ff204798997e7f2277996a283ec8c7a96880ee12504cdf0f069ae1e51ed1
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs, with one notable example being https://botokaw.ru/strik?utm_term=motorola+dcx3400+reset. The presence of a large number of links suggests an attempt to direct users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/strik?utm_term=motorola+dcx3400+reset PDF link annotation
    • https://cdn.sqhk.co/xomatujod/Qhjcjdw/thriftsmart_nolensville_road_nashville_tn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_6047b7994ba1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410447/normal_5ff3b8001303c.pdfIn PDF document text
    • https://cdn.sqhk.co/kiwapipu/Ljfjggc/kuwolosero.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/ejjhcZa/feditafeloruxegasatinol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5ff001214cfe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383452/normal_602542b1e9fa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459188/normal_6064c4d979c94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450883/normal_60116567e8447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460980/normal_603994f1c2b90.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/dOchja8/top_scorers_premier_league_2020_21.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/942152a8-2ec0-4b26-97af-d840ca0b4ab6/20299730449.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_7b9765f6487443aab4040a2f68bac906.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e382bcac-1c95-4ab4-95f6-0d4280f96ba3/16252529558.pdfIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_5cf8e1f0463c457b8c78dfb6952ab53f.pdf?index=trueIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_4d19484e6bdc4fb1b6f459d9713dc8d7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc76c76c-1cd1-4882-a421-06a74d98daaf/4366254137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d269849f-3b1a-4da7-a4de-9e925c0fc6e7/black_and_decker_40v_cordless_trimmer_manual.pdfIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_5ed01ce184ee4f7f92cdfb918f11cd9e.pdf?index=trueIn PDF document text
    • https://006b50d4-ad2a-4261-8279-34542eb0d7b0.filesusr.com/ugd/a640e9_38ffd386d04a4b2b978573577524d67b.pdf?index=trueIn PDF document text
    • https://713ff9a1-ee4a-4317-942a-697bf1b0458e.filesusr.com/ugd/e2f197_96c084ae58f94084812501ef97c5849e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a8084ca-4be1-4fe2-8307-c0582b964ae2/55018842264.pdfIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_53446ec47b6746fdaeab70b73815ed48.pdf?index=trueIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_d8e25d1bea9d485ab46f070edf5a8243.pdf?index=trueIn PDF document text
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_0f3e769664a94056af0cc4b64c92839b.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF282 5400 bytes
SHA-256: eee25d69b2e2baf9bc0b8101eb6d68b1ad6627e07022fcafea157a1c5750c4e6
font_01_sfnt_off000104ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 10672 bytes
SHA-256: 5571cf6efa611787a62c15ba70e2599da7add3f16930741311c4619ba71d938e
font_02_sfnt_off000129d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D4 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15