Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71b6e2c270030df…

MALICIOUS

PDF

77.2 KB Created: 2021-03-04 17:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 60fae388541d7ad0feb1e2b2da0f91b9 SHA-1: 52a1d6ee2cbbf79727a2798e5bfa7abd86764c1c SHA-256: d71b6e2c270030df8cc1f53bd675690adea1c683c1c2dd9d83307928f105bfec
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to nutritional information, directing users to a suspicious URL. The presence of multiple external URIs and link farm characteristics strongly suggests a phishing or malware distribution attempt.

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
  • 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://jacksth.ru/123?utm_term=how+many+calories+in+a+12+pack+of+krispy+kreme+donuts PDF link annotation
    • https://cdn.sqhk.co/novigigexuxo/oKM33hf/word_games_online_free_scrabble.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/mf_35_x_starter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408878/normal_6036fe10f052f.pdfIn PDF document text
    • http://dakuximakux.22web.org/61813234268.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5fc67f1d2f315.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/iZ5iecn/ringtones_for_iphone_7_without_itunes.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/what_does_digital_communications_mean.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/nesovabizonanopolixe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_5fd3b1cdcd97d.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/hp_elitebook_6930p_screen_price_in_nigeria.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/how_to_program_seiki_remote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465003/normal_60228bafa3b6f.pdfIn PDF document text
    • https://cdn.sqhk.co/zatugudaxaji/iQTjiL4/xagutewigowanixifo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://milifarininigo.rf.gd/bangla_dj_song_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6feb9717-2bd6-4f4a-9184-50a63b12c9f9/taco_bell_red_sauce_nutrition.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/where_most_clastic_sedimentary_rocks_are_formed.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/happy_birthday_sheet_music_piano.pdfIn PDF document text
    • http://juraxiza.rf.gd/84470551762.pdfIn PDF document text
    • http://bibirosomuxir.epizy.com/cell_phone_number_tracker_philippines_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c9abeba-1ba0-40ab-b64f-9c54bb657a51/wobixone.pdfIn PDF document text
    • http://zumebixakefeta.epizy.com/vertical_align_middle_css_transform.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_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 5704 bytes
SHA-256: 8ef9e2ec69f23117bb9bfb72f29c98f4e9531ea733f330bec8a7e3d6ba050f7a
font_01_sfnt_off000100ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AE 11252 bytes
SHA-256: d0e9a3e40e93646477726cd28133341a0cb98889afb68f386ecfbf077112df94

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