Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65b9802291e6707…

MALICIOUS

PDF

94.8 KB Created: 2021-03-10 21:07:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c6115c0afc7b9d454811800f5335106f SHA-1: 92dc02fe91a51ca630fdbdedcaa919325fa1b62c SHA-256: f65b9802291e6707b83e20beb0e19092e87ade5119e6a363b94f96443950a76b
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded links pointing to potentially malicious domains, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of numerous links and the callback lure heuristic suggest the document is designed to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://yafferge.ru/award?keyword=alabama+football+2020+schedule+pdf In PDF document text
    • http://uorott.com/why_is_my_whirlpool_dishwasher_clean_light_blinking16y42.pdfIn PDF document text
    • http://fexanamudavixi.iblogger.org/11864385711.pdfIn PDF document text
    • http://alifan.store/50195938433vytno.pdfIn PDF document text
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/bd305d379a23.pdfIn PDF document text
    • http://avto-document.site/dimomurixaselubyqxz1.pdfIn PDF document text
    • http://shop-kid-toys.online/gigifeduludurim3snht.pdfIn PDF document text
    • http://winoorama.site/c2988_unrecognizable_template_declaration_definitionzxd56.pdfIn PDF document text
    • https://webuwexuzebonal.weebly.com/uploads/1/3/0/7/130775053/nemolosewumupaxax.pdfIn PDF document text
    • https://gojojiwegojefuw.weebly.com/uploads/1/3/2/6/132695574/mixezabuba.pdfIn PDF document text
    • http://iwhite.space/231243944627rgx6.pdfIn PDF document text
    • http://lessonsonline.site/noticias_en_voz_pasivakvyn8.pdfIn PDF document text
    • http://fisukebisogovi.22web.org/war_plane_simulator_apk.pdfIn PDF document text
    • http://vanlit.ru/principios_y_valores_de_la_economia_social28npb.pdfIn PDF document text
    • http://qiwi-wallet.online/is_total_gym_good_for_strength_trainingakbx3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roxonolabixatox.epizy.com/broad_crested_weir_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/60609853650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4f5b03-578a-4bf4-b4e1-cfaaaea90fab/filekita.pdfIn PDF document text
    • http://kabudevegal.epizy.com/xumoputile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebda9796-ac7e-4798-b042-2ca94dd44e02/xenonuvagaluwogufof.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/cabinet_mantri_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/tatalaksana_asma_pdpi.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/rizob.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/lead_sheet_symbols_music_theory.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_off00013440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13440 5704 bytes
SHA-256: 6ffe8569d122236241b2a12edbec511b142cdc272e35b5260d49e82988b987d5
font_01_sfnt_off0001478c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1478C 11312 bytes
SHA-256: 9125d180fcd50ba61ef0084b66cb3b6f0130d7eacca70c1d7708936b63f32ddf