Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a4f5edcfdaf7b7…

MALICIOUS

PDF

93.8 KB Created: 2021-06-13 13:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 98aac7d86cd2d0e174b997e15b1746f1 SHA-1: 502d206498953e2d1365214622007073a7616b25 SHA-256: 45a4f5edcfdaf7b79e9b19be20c7c3c3f8a7f385b42549fbc4a3581c20a89a10
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://drafthe.ru/pbw?utm_term=galatians+inductive+bible+study+pdf PDF link annotation
    • https://zukikopan.weebly.com/uploads/1/3/0/7/130775822/wolavadukuvixuvasi.pdfIn PDF document text
    • https://fanamariruzatad.weebly.com/uploads/1/3/4/5/134514157/saxofidigatoluluwo.pdfIn PDF document text
    • https://xorukulimuz.weebly.com/uploads/1/3/4/7/134728044/zuwojitej_gukokovarisol_sarababu.pdfIn PDF document text
    • https://jufapodoge.weebly.com/uploads/1/3/4/5/134582619/petoxewegimefadanene.pdfIn PDF document text
    • https://gutirupivib.weebly.com/uploads/1/3/4/7/134768574/tirod.pdfIn PDF document text
    • https://sekeratogo.weebly.com/uploads/1/3/4/6/134683690/gaxopovize.pdfIn PDF document text
    • https://jedefefebakex.weebly.com/uploads/1/3/4/8/134870379/5699312.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
    • https://uploads.strikinglycdn.com/files/36e7651a-5d2a-44f8-8e45-a9f36e4c80d2/878447904.pdfIn PDF document text
    • http://giribuv.pbworks.com/f/sarah_cooper_100_tricks_to_appear_smart_in_meetings.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/w/file/fetch/144532884/certificado_medico_2020.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/f/ultra_shaders_minecraft_pe.pdfIn PDF document text
    • http://rivikixizub.pbworks.com/f/gudigesuxapavamubomej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f360f10-5c12-47f4-9917-ce95b38f1c14/63738543843.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/how_to_cook_steak_in_a_farberware_air_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd41fd2a-b5c4-4b2d-b139-ebcf5493f451/14436257967.pdfIn PDF document text
    • http://latijanitus.pbworks.com/f/tidal_cracked_apk_download.pdfIn PDF document text
    • http://gosirata.pbworks.com/f/jupaxumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d318248-2e05-4b20-b542-f82affa37e3c/topic_sentence_and_supporting_details_examples.pdfIn PDF document text
    • http://katexawa.pbworks.com/f/fobonopusob.pdfIn PDF document text
    • http://tiduxikuve.pbworks.com/w/file/fetch/144421752/malagevaxiforivifozozix.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/f/what_does_stereoselective_reaction_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b4ab3be-44fe-4736-b9ae-6e9e3103c2be/rainforest_jumperoo_parts.pdfIn PDF document text
    • http://degagogo.pbworks.com/f/dual_whatsapp_apk_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CE 5160 bytes
SHA-256: 93748d620ecd59765a46ab09b062f824e5e096c6cdcf172da1e0185047345678
font_01_sfnt_off00013473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13473 11628 bytes
SHA-256: e27efc871d896b7ef0950967156122f8476ea1ebca7daed78cf16690aeec893b
font_02_sfnt_off00015bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BB3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e