Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d8a6b36038ecdf…

MALICIOUS

PDF

77.7 KB Created: 2021-04-18 02:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f17bdf94aa6ef37cf127c0cefd82c945 SHA-1: d17b8eb55d8b059750016d54bdd9e73e3d436b14 SHA-256: 14d8a6b36038ecdf955d2b0b88df2d386dc2dcd0a26033941a5337b056c59262
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The 'DOC BODY' content, though garbled, includes a reference to 'how to prepare for bpo interview', aligning with the heuristic 'PDF_SEO_LINK_FARM' and the presence of external URLs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

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://midufefew.ru/strik?utm_term=how+to+prepare+for+bpo+interview PDF link annotation
    • http://ravigimojamel.mypressonline.com/quran_with_urdu_translation_word_by_word_free_download.pdfIn PDF document text
    • http://tramlaweq.online/how_to_connect_roku_to_alexa_showwqh58.pdfIn PDF document text
    • http://sezejawi.mypressonline.com/52353318615.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/59517697766.pdfIn PDF document text
    • http://xruhdfo.site/96005920452pnlq0.pdfIn PDF document text
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/1527600.pdfIn PDF document text
    • http://superheatbelt.xyz/semiconductor_devices_physics_and_technology_3rd_edition_solution_manualg8wi9.pdfIn PDF document text
    • https://muvekova.weebly.com/uploads/1/3/5/3/135394778/09851ed3fa4a.pdfIn PDF document text
    • http://cardio-active.site/lois_lowry_informationcaeu4.pdfIn PDF document text
    • https://wozijosetat.weebly.com/uploads/1/3/1/4/131407158/43446714ff80e8.pdfIn PDF document text
    • http://tesar-krd.ru/mevijugibilexixapd7d7.pdfIn PDF document text
    • https://xoxoxiwozolem.weebly.com/uploads/1/3/0/7/130739626/sijujejazul-jakuxabapoke.pdfIn PDF document text
    • https://mumojugaweweran.weebly.com/uploads/1/3/1/0/131070520/593274.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/does_buffalo_wild_wings_do_grilled_wings.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/9902725a-000c-464e-b0a1-dca1bb941a74/zukeruwusutiwijumifafaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/752149ba-926e-44ac-8f62-92b6a68d5250/miwesegimudigodubidebem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed0748be-29f4-4d95-aead-67be99156835/kubota_bx25_backhoe_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f2a306-43ae-42e3-8ef5-1ef76e8d01a8/focusrite_scarlett_2i2_1st_gen_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/340f1d24-6673-4de0-a580-560034d50e06/sherwood_rx_4109_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c43a2a5-991a-4725-99fc-ffee750dc93b/tazilosaxijetumajajenuso.pdfIn PDF document text
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_c501069fba764168a431b9b08385c1a7.pdf?index=trueIn PDF document text
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_e580e4915a9245889111b0166ff2e359.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a5e6b4c-9bbe-4424-a99a-a7c5b8f3e4cc/46763852741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95bf1795-309a-412d-8849-35e96f63391a/71033193619.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_off0000f556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF556 4936 bytes
SHA-256: 53bb976bce7c0035e36cd97088d5155e298e2c605d6e232c98c9340479f67c53
font_01_sfnt_off00010647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10647 10316 bytes
SHA-256: fb6170f916e616adf74c15d87864c545d3c152cad38d3f45369fd3a5f2065a14

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