Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf09b095a4a28f2…

MALICIOUS

PDF

79.2 KB Created: 2021-03-11 10:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 65d62d10817304e15ca655c49f356965 SHA-1: dbc691c9dc1111d89c62f1a55810911681902fa1 SHA-256: baf09b095a4a28f29cc06bb262609db698fb259cada817ad2ad7d9839311da6d
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with many embedded URLs pointing to unknown or potentially malicious domains. The document body is heavily obfuscated, but the presence of embedded URLs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jumiwimov.ru/123?utm_term=the+educators+guide+to+flipgrid PDF link annotation
    • http://savadaqwe.space/london_metal_exchange_steel_price_graphltvn4.pdfIn PDF document text
    • http://getplafond.xyz/rixazusajanisowofipe7s0th.pdfIn PDF document text
    • http://my-favshope.online/mivufejavamarizamenllvdy.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/vegan_milk_machine_manual6i1vo.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/hiN4ieO/87277669797.pdfIn PDF document text
    • http://wordsideget.top/prentice_hall_algebra_2_online_textbookaqa0c.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubokave/whcghDO/winter_warmer_recipes_taste.pdfIn PDF document text
    • http://tk-pobeda.site/sunken_pyramid_guideumq1i.pdfIn PDF document text
    • https://cdn.sqhk.co/wafepazi/juX8cgj/fun_facts_about_mental_disorders.pdfIn PDF document text
    • http://digtalcaliper09.xyz/vishnu_sahasranamam_lyrics_in_hindi7oicu.pdfIn PDF document text
    • https://cdn.sqhk.co/tamenotu/gwTNjhO/epic_minecraft_seeds_bedrock.pdfIn PDF document text
    • http://stopnutristrike.ru/mikifoseke523a8.pdfIn PDF document text
    • http://bbflowers.net/xipudunede5rqzs.pdfIn PDF document text
    • http://istra-backwater.ru/cavernous_malformation_of_the_brainstem0yyh1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_39d4693e0e7448e4a96b4d30097d3153.pdf?index=trueIn PDF document text
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_23d631eaea7b4bddab738f29d6fbe76f.pdf?index=trueIn PDF document text
    • https://56a79910-2d97-40e4-a1df-bca3b17021d7.filesusr.com/ugd/2721fc_6c21ae5049a14cb99030ebae4050d5af.pdf?index=trueIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_60ac3f30573d49b48c41fc493ac92707.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2577ae7f-7269-4554-8dcf-688c18c9531a/can_a_poisonous_snake_kill_an_elephant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1e03fec-a6eb-457d-ac3f-300cbe0cb2af/tugozamazumik.pdfIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_518bf9097f7d4794b715f07533fc8b85.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/406ee685-1a8d-41ca-8003-a96cf3cae80b/61874308398.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_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 5368 bytes
SHA-256: 09f53a904429a9556a7cc4d45db23bba32607eb66d7da4d95a185fd2f647fedb
font_01_sfnt_off00010ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB7 10748 bytes
SHA-256: bb0734f8710452eb65c6512c3893e7d72849155d2275971da076596846d17fa3

Open this report in the interactive analyzer, or submit your own file for analysis.