Malicious PDF — malware analysis report

Static analysis result for SHA-256 516f947b7c916883…

MALICIOUS

PDF

100.5 KB Created: 2021-03-09 04:35:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2a9117d309e13b9930af30b808ea2d24 SHA-1: cfb5c879a92d895cad9774fe9dacfde9bfe941f6 SHA-256: 516f947b7c9168832cc7c62bfb74dc47bc5e64fc0531b4d3049d4f7c542121ba
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing lure, likely attempting to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/award?keyword=biafra+war+in+nigeria+pdf PDF link annotation
    • https://cdn.sqhk.co/letijefa/ihakxPs/mivep.pdfIn PDF document text
    • http://rte-ita.fun/71402280162kurhq.pdfIn PDF document text
    • https://febasenijig.weebly.com/uploads/1/3/1/3/131379808/rikel.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/hbapAgg/webtoon_promo_code_free_coins_2020.pdfIn PDF document text
    • https://lenexemumuvag.weebly.com/uploads/1/3/1/4/131438583/gotarebagasu.pdfIn PDF document text
    • http://naderuromopuru.22web.org/edgenuity_topic_test_answers_us_history.pdfIn PDF document text
    • http://italiahot.space/construct_2_3d82ule.pdfIn PDF document text
    • http://uaportal.site/25715536522hv4nu.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/jhgjgfG/gubabezanemigas.pdfIn PDF document text
    • https://cdn.sqhk.co/kitolitik/jhhggdR/rutaxikutedujogokapepir.pdfIn PDF document text
    • https://bukusafirede.weebly.com/uploads/1/3/4/2/134266240/9dd3b353141.pdfIn PDF document text
    • https://lokamafurixese.weebly.com/uploads/1/3/4/5/134509290/jereduked-gilefivo-roludowa.pdfIn PDF document text
    • https://cdn.sqhk.co/gabebutiz/dRtgg1K/11749790570.pdfIn PDF document text
    • https://zasetumodoroba.weebly.com/uploads/1/3/4/6/134692621/kadadasuvoda.pdfIn PDF document text
    • http://takotonefajale.22web.org/4165432561.pdfIn PDF document text
    • http://lifizix.22web.org/bandit_queen_movie_bluray.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bevomozovedem.rf.gd/jisig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1975d32-176f-4c41-941f-c9ac5e92c428/how_to_replace_ge_water_filter_in_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc9260b-31d8-42f3-91cf-383f6aa71bbe/why_does_my_ninja_blender_power_button_blink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/357635c2-983c-4dce-93b4-8e82c73bd181/simple_3-2_motion_offense_plays.pdfIn PDF document text
    • http://zabipir.rf.gd/98538287213.pdfIn PDF document text
    • http://sidegiri.epizy.com/97280020346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca15a2bc-e56d-4c5d-9cc2-18f9517bd5bc/how_much_weight_can_a_pole_vault_hold.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_off00014dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD7 5140 bytes
SHA-256: 4b1ff74e8397bd6fc1dfe9087d0c17081866106cf19541a9f01d7265fbaa1929
font_01_sfnt_off00015f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F7E 10684 bytes
SHA-256: a6a4d34339db4dde2dd81936379cdcbf21378b7da64d6997b329bfb72e5783ae

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