Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43723afe6307e74…

MALICIOUS

PDF

81.8 KB Created: 2020-12-28 17:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c9f15962ecf326163327589df1f1bf31 SHA-1: 92edd255b15599a0fd0301ece7f6cbca5ac04dcc SHA-256: e43723afe6307e7488da54b554313a80b480e245129e7982c634fbc23df24ac7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://trafficel.ru/123?utm_term=angel+beats+yuri PDF link annotation
    • https://cdn.sqhk.co/gadukupuwe/6hehgif/nusanofenitutefoja.pdfIn PDF document text
    • https://judamuguduvawa.weebly.com/uploads/1/3/4/3/134352100/misub.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/2743582.pdfIn PDF document text
    • https://zikawudewodag.weebly.com/uploads/1/3/4/5/134585044/wiguxinogolixo.pdfIn PDF document text
    • https://nanupubixo.weebly.com/uploads/1/3/0/9/130969545/1016807.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/7735426.pdfIn PDF document text
    • https://jasasenud.weebly.com/uploads/1/3/4/1/134131975/8824899.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/qigihje/81894063333.pdfIn PDF document text
    • https://cdn.sqhk.co/linigurep/dhbFghG/fanawodubipanegefazuxajom.pdfIn PDF document text
    • https://cdn.sqhk.co/guletema/ibm3ijD/new_bollywood_songs_2020_download_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/iauxhmd/disney_battle_heroes_tier_list_august_2020.pdfIn PDF document text
    • https://kenomipijisax.weebly.com/uploads/1/3/3/9/133986884/lagifotejupex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/083de426-4c53-4b0a-a545-27553e78e66d/zatupavitufutusukebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69950d5e-743c-486a-bac0-34c9d8c0aebb/fejexafipiditagejavora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72eb31ff-75e9-48f2-8d25-4bbc932d1180/brother_mfc-j825dw_not_printing.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/85090350923.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/85634899394.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF724 3740 bytes
SHA-256: a3208c013fd00021b845b5070a0b6db4cc7cc8bf8b0dde0ea644a69bb4db584d
font_01_sfnt_off0001047f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047F 5084 bytes
SHA-256: dd7275d615cbab5409d66226d3ab44a7398af2fb4c89907f8310e199640209f0
font_02_sfnt_off000115e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E4 10992 bytes
SHA-256: b01e05c915ca4fc21daa7f0284444fae8dc9ef0dc0da01810711a73c643d978c

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