Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da1585c6ab33ab1…

MALICIOUS

PDF

78.8 KB Created: 2021-04-23 12:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7d0b1109268a1aa04db1f26e6e55c5fa SHA-1: 7107388ccdc4854af8ba7503bd63213a3909e7a3 SHA-256: 3da1585c6ab33ab1c42437c28d0b645ba9110ce333ee7ae793df49b391dbfa3b
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=what+is+the+lean+six+sigma+green+belt PDF link annotation
    • http://dotekebenutedex.scienceontheweb.net/5464162286.pdfIn PDF document text
    • https://kofijowuz.weebly.com/uploads/1/3/4/4/134446653/kajaba_pipon_tuvurotod.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/78857576117.pdfIn PDF document text
    • https://lolejubabam.weebly.com/uploads/1/3/1/3/131379737/3580242.pdfIn PDF document text
    • http://mivifukatovaga.getenjoyment.net/urdu_to_arabic_speaking_books.pdfIn PDF document text
    • http://rusadezebep.mygamesonline.org/ciaphas_cain_the_emperor_s_finest.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_b77918e94e4a41418ac7268764c7da7b.pdf?index=trueIn PDF document text
    • http://kawerulim.onlinewebshop.net/76779920134.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/aprender_ingles_cantando_para_nios.pdfIn PDF document text
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_c6311d98a93e439e8bdf98feca920194.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/shiraz_wine_nutritional_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6d875e-4f9a-4660-8783-298e6128983b/55348665354.pdfIn PDF document text
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_bfc02f3078304bb59fe8a08198f2fba2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65bfa731-e9c0-4f7a-899d-d1647d8b4a42/scout_sniper_training_manual.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_58a1cfdaf29b488c8acdee49ccbd7b6c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/putelekireza/appsc_polytechnic_lecturers_notification.pdfIn PDF document text
    • http://jujuletofu.onlinewebshop.net/wovivuzulid.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_0f2a94f2476e4210a447c2ae268b5f1e.pdf?index=trueIn 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_off0000e7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 5320 bytes
SHA-256: cde7fb2a179f0555fdda651bb3812ca0a5005072ea7b62262ca57eff035dc3de
font_01_sfnt_off0000f9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C3 22264 bytes
SHA-256: 16a1efcf68fbf7ff1f7cd72f6e5f6263326df692f31980fccfe2678ec8473eed

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