Malicious PDF — malware analysis report

Static analysis result for SHA-256 935d0b561088e999…

MALICIOUS

PDF

78.1 KB Created: 2021-03-28 17:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2df805bf54fb6e0c1a72890ab9e2378d SHA-1: 33b1275df19e8ff7090ab7489ec951c9cbadb10d SHA-256: 935d0b561088e999cb5f236a27067e8cf43ca1ce212d0b2abc0e2b13151bace5
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://zajinet.ru/strik?utm_term=where+can+i+buy+west+bend+stir+crazy+popcorn+popper PDF link annotation
    • https://pasazobunev.weebly.com/uploads/1/3/4/6/134670772/sokavadet_kogexudas_rerorijifalo.pdfIn PDF document text
    • https://nozijuga.weebly.com/uploads/1/3/4/6/134698325/3671183.pdfIn PDF document text
    • https://letonezesuju.weebly.com/uploads/1/3/1/3/131383444/bivozi.pdfIn PDF document text
    • https://rilobajivevet.weebly.com/uploads/1/3/1/4/131438099/pupipenotu.pdfIn PDF document text
    • http://posurazatux.mypressonline.com/xivitujuginamikuku.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/69039891246.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/racoon_poison_fly_bait.pdfIn PDF document text
    • https://dilimeriju.weebly.com/uploads/1/3/5/3/135351787/legowixub.pdfIn PDF document text
    • http://fesurowejo.mywebcommunity.org/53101488652.pdfIn PDF document text
    • https://torewofatovamek.weebly.com/uploads/1/3/4/1/134108613/fajajokifejan.pdfIn PDF document text
    • https://tubadelemifevit.weebly.com/uploads/1/3/4/5/134509228/4718580.pdfIn PDF document text
    • https://rowigoto.weebly.com/uploads/1/3/0/8/130813427/koxutisom-xotasonuti-gigezana.pdfIn PDF document text
    • http://lulodexov.scienceontheweb.net/variable_cost_formula.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/dozore/petatalerifawexozib.pdfIn PDF document text
    • http://lanosebezazov.onlinewebshop.net/wesatoxezerunizu.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/beetalk_for_ios_free.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/what_is_agile_methodology_process.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/82848940804.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/how_to_use_lg_flip_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/28410826416.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/how_to_preheat_black_and_decker_toaster_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/51510007391.pdfIn PDF document text
    • http://kopolug.myartsonline.com/ml_a_pulgadas_cubicas.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_off0000f0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E2 5524 bytes
SHA-256: 8b2cfebbf67ba9ee154c817d0d30c05d2d51c54f62c5c04c703fc74e7d73b7ea
font_01_sfnt_off000103c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C6 11704 bytes
SHA-256: 6a4cf5ef9c0dbdf67be14a2db3590deb5a14d23e41d46a0737c6d4c1152bd7f5

Open this report in the interactive analyzer, or submit your own file for analysis.