Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae3fca276a2d60c…

MALICIOUS

PDF

78.9 KB Created: 2020-11-19 13:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e09009e46c46019100366445edd3ea07 SHA-1: d9cd27f117c8c58be5d85b0a1a14c183fe762699 SHA-256: cae3fca276a2d60c3816f6b6683274467673fe1d82f39e7bb1582abef458ec68
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and flagged as malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs and link farm structure suggest an attempt to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://ggtraff.ru/strik?utm_term=black+desert+online+desert+guide In PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/guseded_piret_sibadafomo_kuwok.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/nilurivepabedax.pdfIn PDF document text
    • https://mawebexakonu.weebly.com/uploads/1/3/4/3/134390129/zaxozofefuso-mofekefepusi.pdfIn PDF document text
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/3148753.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/vedus-jolizo-gipomodena-rivuvoz.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/totewojet.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/59712eab3.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/d4e5c8ce-cc0b-465b-9374-23c5b00713c5/58270522229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c61313e4-f88e-40a0-9c06-e58b763466dd/79012359117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b43e25-03ba-44a2-8b7e-1a6bfc228767/programacion_java_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c095f59-d68e-4813-ab32-187dc3720f41/way_of_the_seal_companion.pdfIn PDF document text
    • https://s3.amazonaws.com/pusumowi/watkins_iq2020_circuit_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162ac852-e1e6-4adb-9a37-25ecc92f9086/58311056759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f02e39-1e65-4c8f-a39c-870e840eb4cc/66838500799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63ab14b-5889-44f9-89a3-291b8dba74ad/46843467821.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD528 3072 bytes
SHA-256: 52da0c027bd406ca21967224ac7ee312698243c63b02111a5d1952783d0eadaa
font_01_sfnt_off0000e02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02A 5100 bytes
SHA-256: 95186975e43ed411cdd91417e61a998748611a506c784a50faa337e2f570df1a
font_02_sfnt_off0000f181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF181 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_03_sfnt_off0000fa0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 11044 bytes
SHA-256: 58e1c79b2fa61d4248af1dfd1090f28dfe8893de0c8048bd044dcbc2259f3b9f
font_04_sfnt_off00011fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2