Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c285030b9adff0…

MALICIOUS

PDF

77.6 KB Created: 2021-04-09 21:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fc71569c0bbfc51d155c6429e74a7a25 SHA-1: f4f99431b881c55191e101ed2dc2635196d7e977 SHA-256: 44c285030b9adff09c5794e5ca0b7fb618b4b0da322799bfffe4661d3c12ed6a
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 0.9984

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://dafemum.ru/strik?utm_term=my+cloud+mirror+dashboard+not+working PDF link annotation
    • https://tazipapanora.weebly.com/uploads/1/3/0/7/130776418/lagapifutobatuj.pdfIn PDF document text
    • https://robavefozaxun.weebly.com/uploads/1/3/4/3/134379548/2431375.pdfIn PDF document text
    • https://vekibapovadivoz.weebly.com/uploads/1/3/0/8/130873848/pajobele.pdfIn PDF document text
    • https://zoxalutaj.weebly.com/uploads/1/3/1/4/131407742/dc67338d.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/gojufemudisuwe.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/zumirubujobuvikipi.pdfIn PDF document text
    • http://vatamulejuvovi.22web.org/13345961774.pdfIn PDF document text
    • http://wajobok.iblogger.org/3497418294.pdfIn PDF document text
    • http://fafabil.getenjoyment.net/wuvegiw.pdfIn PDF document text
    • http://rasipafus.getenjoyment.net/10159432647.pdfIn PDF document text
    • https://risogaruwakev.weebly.com/uploads/1/3/4/6/134634919/a47c3f55c1.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/cfb44476-2890-4d88-ac52-2478601f1526/sex_and_the_city_movie_trailer_2.pdfIn PDF document text
    • http://leragirifodoz.rf.gd/assamese_dictionary_original_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8562f4e1-bddc-4110-acfc-3a392de44c93/new_jersey_residential_lease_agreement_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/701f0f17-6564-44a6-81ce-9b8e8ebf7704/timex_ironman_classic_100_review.pdfIn PDF document text
    • http://madigekole.onlinewebshop.net/81143767399.pdfIn PDF document text
    • http://wosotufozutula.epizy.com/pudowebori.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/shrimad_bhagavad_gita_sanskrit.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/77394882686.pdfIn PDF document text
    • http://renureva.epizy.com/1809414765.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/cid_ka_full_form_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/partnership_appropriation_account.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/free_chalkboard_design_elements.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_off0000f0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EE 5756 bytes
SHA-256: 4358f11c06a26a86429c72323a1ef50719f7182ad710e64822f9d555ab95f737
font_01_sfnt_off0001047b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047B 10792 bytes
SHA-256: 85de6ef57074c1773c4e71228ea4835e775049dbee1efeb391b79cd5b35c6e08

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