Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e22e8b72720452d…

MALICIOUS

PDF

69.7 KB Created: 2021-02-01 02:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 248b57c73bd5dd5b6668dd5d43f7024f SHA-1: 99b99dc5df27e9017481d2ed7d117b6934c5d9eb SHA-256: 3e22e8b72720452df94257f9a4c9050302d774d555a9c8abe3bd677f007896d4
156 Risk Score

Malware Insights

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

The sample is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, characteristic of a link farm designed to direct users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest it is intended to lure users to download further malware or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://maypoin.ru/123?utm_term=john+yurconic+agency+northampton PDF link annotation
    • https://cdn.sqhk.co/lanumakefu/iifjjhc/karaoke_app_offline_free_download.pdfIn PDF document text
    • https://rajuputodetu.weebly.com/uploads/1/3/4/6/134682309/xuwaw_jawojasem_rinanodis_milate.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/hcvSwji/hills_of_steel_game_online_play.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454684/normal_5fdf0373a0562.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/hhGUegc/gofuvikiletezomigurejonik.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/gijeVji/bad_piggies_pc_game_activation_key_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385213/normal_5fca40a3e9e59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374537/normal_5fff579dc23b3.pdfIn PDF document text
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/vofenanelem.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/cIsrjjw/ultimate_fall_guys_android.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/ehdFUV0/stickman_fight_hack_apk_download.pdfIn PDF document text
    • https://verigidiloje.weebly.com/uploads/1/3/0/8/130874422/4503bec4e1a1c3a.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/ii8IDNb/child_care_assistance_louisiana.pdfIn PDF document text
    • https://cdn.sqhk.co/lanamixese/ZjmuHga/vikusabasegumuvoguka.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/UBgdShf/heroes_of_71_mod_game_download.pdfIn PDF document text
    • https://vipefujalebir.weebly.com/uploads/1/3/4/7/134744486/rafasomesobod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378386/normal_5fe2c44d00828.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/UGL3EXp/demelenexokosapo.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/2ifD0gc/tititikewanusi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391335/normal_5ff9101789509.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD488 5228 bytes
SHA-256: 3cffb4473af85a880217e580daf0a349fb5223021fe0f8e2de0ec92fe48499ea
font_01_sfnt_off0000e633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 10376 bytes
SHA-256: f1c92ef60c402afc39ce417d0f41652849353f3b89b04577bce7f4c1fc027797

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