Malicious PDF — malware analysis report

Static analysis result for SHA-256 520271a60cd3e914…

MALICIOUS

PDF

73.6 KB Created: 2021-03-19 22:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cb8f53fa82d5009de7efb5c9cccc6304 SHA-1: 54faacf21aa961be732b39bd922b16bbad11620b SHA-256: 520271a60cd3e9142fc0062b2d60f2d96a711e7b592450643a8cf7b050cbbfaa
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 0.9993

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=how+much+sodium+in+a+wendy%2527s+chocolate+frosty PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491175/normal_5fe6324e2e922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465402/normal_5fe148024affd.pdfIn PDF document text
    • https://wopuwidutava.weebly.com/uploads/1/3/5/3/135322166/lexakabapufamep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421056/normal_60009ea7dd2c0.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/ceo_mp_form_8.pdfIn PDF document text
    • http://zowogusatutojus.mywebcommunity.org/doworojapatu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401976/normal_60067ef882df3.pdfIn PDF document text
    • https://nowesepi.weebly.com/uploads/1/3/1/1/131164229/petanifalen_wojoju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480387/normal_5ff049914dea2.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/tuvopezuxorozisopijibopum.pdfIn PDF document text
    • https://duwiwobejul.weebly.com/uploads/1/3/2/7/132740292/4364273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456135/normal_6027ba963b1db.pdfIn PDF document text
    • https://gofegupozomo.weebly.com/uploads/1/3/4/4/134479888/24903c8fae07a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruzevatiwabakiz.epizy.com/harry_potter_8_film_collection_dvd_unboxing.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/74189347300.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/odia_movie_balunga_toka_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/8096214435.pdfIn PDF document text
    • http://tinulelor.rf.gd/bidaai_movie_songs.pdfIn PDF document text
    • http://rujewaridulev.rf.gd/20630616709.pdfIn PDF document text
    • http://mujedofagogi.epizy.com/vexukulaporup.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/tanumazuva.pdfIn PDF document text
    • http://pufaxutunipoja.epizy.com/usda_zone_7a_planting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/53640032872.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_off0000e290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE290 5452 bytes
SHA-256: fe6c826698a669c03e81b4c6d86493d44f9b1cc743c1e175f98b2325ca4f9dd4
font_01_sfnt_off0000f50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50A 10448 bytes
SHA-256: 1c7c8ae0ee512c1f479eb17137692dd51d40980bf002e429d8b9c3a549020d6c

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