Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e1a27808575fd3…

MALICIOUS

PDF

73.1 KB Created: 2021-04-28 23:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ecdf9ba544358c043290ecfff4e144a0 SHA-1: 1b5be2a4e08fa913593be9f849a9a0408ecec470 SHA-256: f0e1a27808575fd39fbd5bf195add878bbd21b09c210f3e93404dbc78404577c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://golowaki.ru/strik?utm_term=father+agnel+engineering+college+vashi+code PDF link annotation
    • http://nugawijuxuv.mywebcommunity.org/96105513278.pdfIn PDF document text
    • https://cdn.sqhk.co/manizamo/ijithcX/nozevuxemanurijil.pdfIn PDF document text
    • http://rakufudufe.iblogger.org/bapujiwemilokofus.pdfIn PDF document text
    • http://lezepubaj.iblogger.org/85898829951.pdfIn PDF document text
    • http://porufune.iblogger.org/convert_base64_string_to_javascript.pdfIn PDF document text
    • https://cdn.sqhk.co/kegimovotol/oSfigTq/11101931681.pdfIn PDF document text
    • http://noxodexuvalolum.iblogger.org/software_filmora_full_crack_32_bit.pdfIn PDF document text
    • http://tivulaxovena.22web.org/pl_sql_users_guide_and_reference.pdfIn PDF document text
    • https://cdn.sqhk.co/susopavazane/fYieage/754780839.pdfIn PDF document text
    • https://cdn.sqhk.co/tijatabov/egcdNgg/84901924215.pdfIn PDF document text
    • https://cdn.sqhk.co/fepogosu/hi6licm/pamowamufexebexowajasu.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/sikuniluvuximuxigukuxul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://seguwogira.rf.gd/tunodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563e0741-78e1-49d9-a954-68e762c608b7/10297353069.pdfIn PDF document text
    • http://josotemasafu.rf.gd/craftsman_leaf_blower_bag_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c92b085-732d-45cb-8c13-75668ae570fb/pujulubaguwonokivora.pdfIn PDF document text
    • http://talanusedos.epizy.com/abyat_e_bahoo_kamil_download.pdfIn PDF document text
    • http://nogobixa.epizy.com/show_your_work_austin_kleon_espaol.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_off0000dfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 5216 bytes
SHA-256: d05fbb03cf51a6f2316197d3d37da428e51a6dec28cff88c03a2e77b5bb42919
font_01_sfnt_off0000f17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 11100 bytes
SHA-256: ed450d5d8ae4c179f4ee24076b724498cb9c62bb39617cdb3d4df523f939e009

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