Malicious PDF — malware analysis report

Static analysis result for SHA-256 1911bb8e52b1e66b…

MALICIOUS

PDF

76.3 KB Created: 2021-03-29 07:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fbd4ff14e850e9f0a240950d769f5874 SHA-1: 619dfd8d0600a9a8a9f8cbb92250f1365e53d550 SHA-256: 1911bb8e52b1e66be886274a3c764c3e6190cf1be09be8393bd6ec7e6508a6e9
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a high-confidence heuristic firing for PDF_SEO_UTM_REDIRECTOR_LINK, indicating it's a phishing lure for a free download. The embedded URL, https://dugedepap.ru/aws?utm_term=bushnell+voyager+reflector+telescope+700mm+x+76mm, is the primary indicator of this malicious redirection. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/aws?utm_term=bushnell+voyager+reflector+telescope+700mm+x+76mm PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366003/normal_604f31f4db9f9.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/5203378985.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_5fe2246bc6d67.pdfIn PDF document text
    • http://jibakerutev.mypressonline.com/independent_and_independent_variables_in_research_methodology.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476954/normal_5fc89900cc6cc.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/muwegerevoka.pdfIn PDF document text
    • http://tuwimig.scienceontheweb.net/fetumazokubezin.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/xaluv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pibajuwi/adb_not_responding_in_android_studio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581a0ae5-cd72-462e-9a0a-9cc43ad3a048/sawakuredogodimelab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f52343-ac97-4b55-9f14-8a795841028c/how_to_reset_a_kill_a_watt_meter.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/fundamentals_of_fluid_mechanics_7th_edition_solution_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6864bdf8-afc1-42b9-9b5e-522eea6ac88e/71486459493.pdfIn PDF document text
    • http://kisirurozuwori.rf.gd/dawekedutuziwedaz.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/agriculture_definitions.pdfIn PDF document text
    • http://didazejitikav.rf.gd/construction_assistant_project_manager_salary_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/78709939710.pdfIn PDF document text
    • http://lipubumili.epizy.com/transformers_3_characters_autobots_and_decepticons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb854a6-f63b-4c8e-a21d-7e659b3ef58c/vamikemofanobujivara.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/honda_100cc_dirt_bikes_for_sale_craigslist.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD08 5920 bytes
SHA-256: 59e12c9f30bb84a268f0e83c08454b308e1907fea2b8a22ee5ad81e226a684d4
font_01_sfnt_off0000f118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF118 10620 bytes
SHA-256: 9b401c2baaa76f2954356644abff51988dddc77e2808447b2bcf555f937902cc
font_02_sfnt_off00011568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11568 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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