Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88f3d749840551b…

MALICIOUS

PDF

75.5 KB Created: 2021-03-07 12:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dce4748cd3ec313a5e9cdba331779f78 SHA-1: 9854b9e2d513cba68048223a4073dba4eee95569 SHA-256: e88f3d749840551bdc2762d3757f708f724e5c2d0b881ee5ad2bd5bef13e0431
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 0.9991

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://jacksth.ru/wix?keyword=sharp+cv-p10pc+10000+btu+portable+air+conditioner PDF link annotation
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/5261232.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472774/normal_5fcee96c87542.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/md2wgda/ritopavuziw.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/swijjjc/teenage_mutant_ninja_turtles_legends_cheat_codes.pdfIn PDF document text
    • http://pometukiwalevu.22web.org/how_long_do_pool_heaters_usually_last.pdfIn PDF document text
    • https://sabigojepesadiz.weebly.com/uploads/1/3/2/8/132814096/xuzifojufa-gapexapap-rivuwejosubud-lokepogev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487005/normal_5febbb7cc48d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374838/normal_5feb4e8322cfc.pdfIn PDF document text
    • https://zagumukukawikam.weebly.com/uploads/1/3/4/6/134608037/lipada.pdfIn PDF document text
    • https://mefuwowenapes.weebly.com/uploads/1/3/4/6/134611128/raborugosapaduj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424013/normal_5fe2a0350c3e8.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/jc4jhtJ/94524358431.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zexukojol.rf.gd/cafetera_dolce_gusto_melody_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62f3997-2075-420f-8b96-30e6c2025092/trail_tech_vapor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfacb59c-9c5b-49d4-bd79-9d1d01b14e41/92559618187.pdfIn PDF document text
    • http://muzokusadozejog.epizy.com/79136048549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117ddc0e-fd9e-4f70-a4f2-ee0e5ecbbb4c/what_are_all_the_sins_listed_in_the_bible.pdfIn PDF document text
    • http://bepofitome.rf.gd/tasif.pdfIn PDF document text
    • http://befadiw.rf.gd/verb_form_imperative_exercises.pdfIn PDF document text
    • http://gerinaselamezos.rf.gd/macromolecules_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15afef15-f9db-4e46-89f2-9652aa92d1af/mexibolekosak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc5d64cd-8201-42e5-904f-ac2fd0a0e3e7/ganimizeta.pdfIn PDF document text
    • http://bazoniwawore.epizy.com/35226205736.pdfIn PDF document text
    • http://wizugujolapalel.epizy.com/12509865989.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_off0000e98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98A 5512 bytes
SHA-256: 53728ed743c2186d834cbb730aa7a0c9a1297131644b4b2a3293e29f527494bb
font_01_sfnt_off0000fc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC47 10560 bytes
SHA-256: 4e2ff7220dcc9003f3ec429e05704399f62d56355f2ddc4d2b31d6a79e835dd7

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