Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e79449a65e4120a…

MALICIOUS

PDF

68.6 KB Created: 2021-05-01 20:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b164e037ff1b7818c4692b0235d77ef3 SHA-1: a3e80429d86536c64cbbb7064abd6335cb2f642c SHA-256: 7e79449a65e4120a86d631f55826713e9fe5550f5205d65ab03e894e44914264
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one specifically identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'social media research paper', directing users to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=what+is+social+media+research+paper PDF link annotation
    • http://tilotuletopaba.22web.org/antologia_de_cuentos_hispanoamericanos.pdfIn PDF document text
    • http://sokavosutab.22web.org/fanetel.pdfIn PDF document text
    • http://mejuzuw.scienceontheweb.net/divine_mercy_novena_tagalog.pdfIn PDF document text
    • http://gazizelasama.getenjoyment.net/preposition_meaning_in_tamil.pdfIn PDF document text
    • http://fevazuzimewodev.iblogger.org/pibanoxifewixolebibogo.pdfIn PDF document text
    • http://femetorisufi.sportsontheweb.net/autocad_architecture_2020_tutorial_free_download.pdfIn PDF document text
    • http://muxoman.mygamesonline.org/10137631421.pdfIn PDF document text
    • http://vofigasu.medianewsonline.com/77213898080.pdfIn PDF document text
    • http://farotosinotom.mywebcommunity.org/antenna_handbook_theory_applications_and_design_free_download.pdfIn PDF document text
    • http://vajesafosedepur.mywebcommunity.org/73201254124.pdfIn PDF document text
    • http://kejumazinanu.mywebcommunity.org/wusuliwivakiwif.pdfIn PDF document text
    • http://neditaxuvim.getenjoyment.net/63327374741.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/15375418669.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/d29cb1ba-ed43-45ac-98f7-fb16c5ec6f27/wegaded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e38f4a-c54b-4b56-9ac0-5a7373915325/operations_management_william_j_stevenson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617e6b15-c1b7-4216-a326-2b8a037b868a/how_to_calculate_rhythm_strips.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/vuzatajelovojaxage.pdfIn PDF document text
    • http://binawojojin.epizy.com/ap_reorganisation_act_2014_telugu.pdfIn PDF document text
    • http://wodijoparipo.rf.gd/escala_cromatica_saxo_alto.pdfIn PDF document text
    • http://suwiwomuve.rf.gd/28799438317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/863f5596-418e-4b9f-b5eb-e7c5612fe616/wexejegozabuxonejekolawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/611a72fa-a524-42b7-9115-4c09955432ac/15183184967.pdfIn PDF document text
    • http://renedutej.rf.gd/tidovilewazajule.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_off0000d08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08D 5324 bytes
SHA-256: f2ae6b835269e9820262f56753da4054f529202928a2fe76c5bfb27b709de2f3
font_01_sfnt_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 10080 bytes
SHA-256: f178caef3b20a88fc6b609549598a1e3860ac55908f9828c5da55098ad442357

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