Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5ac33ef8695e35…

MALICIOUS

PDF

76.8 KB Created: 2021-03-14 12:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d27dd2a7c58ccaaa4ed7f217584d7148 SHA-1: fc4c6bef7e785c60aed1c68f73072ed0ca449752 SHA-256: 5c5ac33ef8695e3511fcbbf8fa654b8be2dfa1092eca071bf9ae7a71b6e206e4
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm. One of the primary links directs to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 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.
  • 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://dafemum.ru/award?keyword=story+of+my+life+shrek+sheet+music+pdf In PDF document text
    • https://ponozivodu.weebly.com/uploads/1/3/0/7/130775347/bdf91b613420ea3.pdfIn PDF document text
    • http://pay-order.info/catfish_bait_near_mejay6y.pdfIn PDF document text
    • http://nuveclovet.xyz/bible_passage_about_the_blind_man8715c.pdfIn PDF document text
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/ce278b8e27.pdfIn PDF document text
    • https://filudatobo.weebly.com/uploads/1/3/2/6/132681654/5118772.pdfIn PDF document text
    • http://abzac.me/your_choice_restaurant_menuw7ht8.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/kimigaredaxeki-bitajefitanu-lefexufeba-gosud.pdfIn PDF document text
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/2063475.pdfIn PDF document text
    • https://lobixeximoruse.weebly.com/uploads/1/3/5/3/135319822/mabeja_vugaruzoneset_voxejexuganejan_resemumuwofugaj.pdfIn PDF document text
    • http://trackcreditscore.info/replace_honeywell_thermostat_with_nest_ukjy4bx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zijivevip/rewrite_the_stars_piano_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/18164159030.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/genibot.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/a_discovery_of_witches_season_2_episode_4_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/riremususumiter.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/poliresazebuwoxepogofages.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/zokazemevagedage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11521e0e-c58f-4b33-8c19-57ce391be448/que_es_la_metodologia_de_la_investigacion_cientifica.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/brother_mfc_7340_toner_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/95075153079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00205d75-d922-4fe6-9d22-54c6aba5e580/zuvuroberabekijojimuru.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_off0000eefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 5452 bytes
SHA-256: 5b1c1890147e510e46ce66fdce8740c02a5146c7ec2212822e3e3b302a5cf198
font_01_sfnt_off0001016d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016D 10544 bytes
SHA-256: d6f848051e98b8df226b08c52b8b7054f4999edc1f3b3a992d7e0542468dd65a

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