Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2f825923993b97…

MALICIOUS

PDF

78.2 KB Created: 2021-05-28 07:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 064634a3d7b3ab0ea093c213f6caeb90 SHA-1: 0a6de153e5b18ec0928fa732a494e3094d05530f SHA-256: 6b2f825923993b97de255ba81de6281ac35f4a83d692681170455de34376ad30
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external links pointing to disposable hosting. The ML classifier and ClamAV also identified it as malicious. While no scripts were extracted, the structure suggests an attempt to manipulate search engine results or redirect users to potentially harmful content, aligning with a phishing or SEO spam attack pattern.

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
  • 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.
  • 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://xizoputi.weebly.com/uploads/1/3/4/6/134679655/nezorimef.pdf In PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/kokoriri.pdfIn PDF document text
    • https://jikufowawuful.weebly.com/uploads/1/3/2/8/132814232/xofovigikizidakobari.pdfIn PDF document text
    • https://faxasuxudoxo.weebly.com/uploads/1/3/2/6/132695360/baxaletirekave.pdfIn PDF document text
    • https://luwidejike.weebly.com/uploads/1/3/4/8/134881341/bapev.pdfIn PDF document text
    • https://pimujupaz.weebly.com/uploads/1/3/4/4/134440235/nezuxobaraf_zerubaseluwosex_segututunu_sufuf.pdfIn PDF document text
    • https://bowizavonefuva.weebly.com/uploads/1/3/5/3/135338395/vosarukofiruka.pdfIn PDF document text
    • https://lopekemin.weebly.com/uploads/1/3/4/6/134628767/nebibuxo-jabujosozeji-jilopavumelox-fijeke.pdfIn PDF document text
    • https://niritamin.weebly.com/uploads/1/3/4/4/134486676/sagoxavowujevubobep.pdfIn PDF document text
    • https://nosodawef.weebly.com/uploads/1/3/4/6/134693330/6086819.pdfIn PDF document text
    • https://kotogafisix.weebly.com/uploads/1/3/0/7/130740127/ce8242.pdfIn PDF document text
    • https://zebilukirun.weebly.com/uploads/1/3/5/3/135306511/wozozinuxo_dolene_kirizivo_lubadaxepe.pdfIn PDF document text
    • https://vomuzubedabop.weebly.com/uploads/1/3/0/9/130969103/wokafisobeg.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/romatowujudif.pdfIn PDF document text
    • https://zuxovupogoxa.weebly.com/uploads/1/3/5/3/135386903/pisixalelep-fulinapewifi-surigususege.pdfIn PDF document text
    • https://pegepigav.weebly.com/uploads/1/3/4/4/134481067/14fabc534fdb53.pdfIn PDF document text
    • https://piloseweme.weebly.com/uploads/1/3/4/4/134491853/tofukif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/jJyWpsOf3IE/wb?keyword=honda%20hr215%20hxa%20partsPDF link annotation
    • https://uploads.strikinglycdn.com/files/e64e0a2f-6b9e-4bde-8487-b91ac6c62301/kenmore_model_417_washer_dryer_combo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/201ceb68-3c2b-4f6a-a0a8-1a69ae65c4de/the_how_of_happiness_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/862445da-0d76-4b5b-9982-abb45e5fd6fc/2008_jeep_grand_cherokee_diesel_towing_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066d78b4-7417-4dab-a11e-20532afbbdf2/graphing_rational_functions_worksheet_2_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f9b595-eadb-492d-8a9f-8ca8d33c2812/how_to_play_settlers_of_catan_explorers_and_pirates.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_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 5352 bytes
SHA-256: a50be1a8331106d7b0689d41307e09b0f9ca16fa0a36e198517c23b6ecf66a20
font_01_sfnt_off00010600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10600 11220 bytes
SHA-256: 8a01b12634f0c69a0f842a11d8c1a1a447f168549dca3fa17610be65f98a5c68