Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5378ba50d1f70cf…

MALICIOUS

PDF

81.4 KB Created: 2021-04-04 15:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9e72ab01cdc3c73bc947070bfab297a1 SHA-1: 9cae64197c6c226c0f4abe790f012e3df2792713 SHA-256: a5378ba50d1f70cf7b172ae23ef1199f7b8961f4a28c24635ddce7c8196c0d3e
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/award?keyword=alphabet+phon%25C3%25A9tique+espagnol+pdf PDF link annotation
    • https://cdn.sqhk.co/dosijowikul/haijl9S/32562820583.pdfIn PDF document text
    • https://sixixufur.weebly.com/uploads/1/3/2/3/132303163/basaduzufejileb-vetejuvukip-nufugesadexomuv.pdfIn PDF document text
    • https://tozisodije.weebly.com/uploads/1/3/4/4/134486105/matenumufadexewaripe.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/ejdTIid/slime_simulator_relaxing_and_satisfying_slime_asmr.pdfIn PDF document text
    • https://cdn.sqhk.co/xadelakora/gF0jicj/77171844280.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/igeifgg/legubo.pdfIn PDF document text
    • https://tifobavojosimiz.weebly.com/uploads/1/3/4/5/134505066/13b82d9fd34da.pdfIn PDF document text
    • https://jakigirizog.weebly.com/uploads/1/3/1/4/131453624/muwizeduv.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/iijdibx/derwent_watercolor_pencils_review.pdfIn PDF document text
    • http://steelsho3.club/how_to_stop_bed_alarm13k2i.pdfIn PDF document text
    • https://cdn.sqhk.co/pavupaken/zjbxSqs/jorov.pdfIn PDF document text
    • https://dalideno.weebly.com/uploads/1/3/5/3/135384103/369df6f4380f.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/kolawipabifum-mafadavonefubij.pdfIn PDF document text
    • http://voyazh-shina.com/aavesham_movie_in_telugutbd7w.pdfIn PDF document text
    • https://cdn.sqhk.co/kulamogo/g5jjjhb/suwepuvolilefun.pdfIn PDF document text
    • https://ratisajaruniz.weebly.com/uploads/1/3/1/4/131455275/8048108.pdfIn PDF document text
    • https://cdn.sqhk.co/pugijuzo/Ahahipb/42567812737.pdfIn PDF document text
    • http://1yamal.space/99918996695iewzh.pdfIn PDF document text
    • http://galoomer.online/503187792166mkg5.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/bezegoluzose/68776258005.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/jekexaxinezopuzeniledemon.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/80115069654.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/ks3_maths_multiplying_decimals_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/hair_dryer_buying_guide_india.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_off0000f59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59D 5604 bytes
SHA-256: 92a41ea18df45301236c01e6b1bccc47a90c180e4838ea0e19b0e80776e71829
font_01_sfnt_off0001085a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085A 15344 bytes
SHA-256: b18da35bb3b73baaf4a25692a6543748989136b0b45ab4e7df3c5915f4ee8bd5

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