Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec68bdc1a7694127…

MALICIOUS

PDF

76.3 KB Created: 2021-04-24 17:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 58ea5d89f856532358ad9812c14ced83 SHA-1: 219c89d884c8ab881159012a81e4177159b97bb7 SHA-256: ec68bdc1a7694127adebac036f44ff2e7ed097d60c836a23b09f44b46eab7f74
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is classified as malicious by ML models and ClamAV, indicating a high probability of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of an SEO spam or phishing campaign. The document body, though heavily obfuscated, contains text related to 'where to buy janome' and application metadata, likely serving as a lure to drive traffic to the linked sites.

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://ponafet.ru/strik?utm_term=where+to+buy+janome PDF link annotation
    • https://cdn.sqhk.co/movijomo/t3jggf3/drag_drop_bootstrap_template_builder.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/QnhjdCl/word_life_crossword_puzzle_mod_apk.pdfIn PDF document text
    • https://limopepubev.weebly.com/uploads/1/3/4/6/134627214/19495c7.pdfIn PDF document text
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/matodetuvesujalomej.pdfIn PDF document text
    • http://xejevojesinil.22web.org/46382222023.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/ia7jcIE/deepmind_6_manual.pdfIn PDF document text
    • http://noniteziduvi.iblogger.org/broomstix_rpg.pdfIn PDF document text
    • https://cdn.sqhk.co/nilimijano/doojcDK/final_goal_meaning.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b57c5949-684f-45b5-97a9-5ea5a0a062fa/fufodugigazezux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3457b102-14db-47d7-b3fd-a99f52bf70c9/bobakumodilikuxawajigo.pdfIn PDF document text
    • http://modedavap.epizy.com/didapasavode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a536bf5-2295-4424-ab2a-3cbad7b12916/woxomexuwutemajitisig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee90549d-010e-41ec-8ff5-299568c2f53d/61974382691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cdc770a-87b4-4116-a06f-abf1e558032a/luwowugif.pdfIn PDF document text
    • http://vejavete.rf.gd/ayat_ruqyah.pdfIn PDF document text
    • http://fomobiwudaz.rf.gd/begujapofigubopepagoje.pdfIn PDF document text
    • http://mepojijolotezud.rf.gd/81828259446.pdfIn PDF document text
    • http://faminosokaru.epizy.com/abstract_algebra_a_first_course_saracino.pdfIn PDF document text
    • http://temomuduzuba.epizy.com/24815401297.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_off0000ec50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC50 5044 bytes
SHA-256: b46eda51a97b8fd7f3dff395cf991d6b6b8832dbcd6b6cc86af48b06c2ef365c
font_01_sfnt_off0000fd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD66 11324 bytes
SHA-256: b76e068978ba79cf080e71c6fddd96c9ae08da099df4d3318ef39c58dee0a0db

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