Malicious PDF — malware analysis report

Static analysis result for SHA-256 475c59331b1dac89…

MALICIOUS

PDF

176.1 KB Created: 2021-03-16 08:01:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: eb5fcd3085f96eafd7b19998fcf07681 SHA-1: 1b91e6c1c4eac398d82ade34c6b8b7757492a0b2 SHA-256: 475c59331b1dac89e89ffd8c4b8d6cb9d1e455e4ab64b535d04160d98ca8b5c0
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including suspicious and invisible links pointing to external domains. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan PDF. The embedded URLs, such as http://com-login8.xyz/why_my_battery_is_draining_so_fast_iphone_6sdz2tw.pdf, are likely used to redirect users to malicious sites for credential theft or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jumiwimov.ru/wix?keyword=derivative+classification+answer+key PDF link annotation
    • https://cdn.sqhk.co/gimexigerub/nIu6jVZ/tamil_nadu_weather_report_news.pdfIn PDF document text
    • http://gufutaca5.xyz/lexomovaxurizzikin.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/fe85fc661.pdfIn PDF document text
    • http://fakaripeti.xyz/49288226677tux4b.pdfIn PDF document text
    • http://chebsvet.ru/jerry_kuhnhausen_mauser8cfvw.pdfIn PDF document text
    • http://bioforcecolumbia.site/xbox_360_controller_wired_for_windows_1068nz5.pdfIn PDF document text
    • https://geneferazudim.weebly.com/uploads/1/3/4/3/134362459/xinufimigad.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/bxih6hf/we_happy_restaurant_mod_apk_2._3._20.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/fjjvmal/43725255940.pdfIn PDF document text
    • http://chambrehub.xyz/minn_kota_i-pilot_replacement_remote_controlezh9q.pdfIn PDF document text
    • https://tozisodije.weebly.com/uploads/1/3/4/4/134486105/5438bf0b8.pdfIn PDF document text
    • http://natnat.fun/46811648769iwlyc.pdfIn PDF document text
    • http://gdztut.com/best_xl_big_green_egg_accessoriesc35hy.pdfIn PDF document text
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/gubanemo-guwobofijux-lokilibu-sigabapize.pdfIn PDF document text
    • http://salonapp.xyz/the_filmmakers_handbook_steven_ascherb9301.pdfIn PDF document text
    • http://pubgucbayim.com/biometric_technology_ppt_frees6c2c.pdfIn PDF document text
    • http://com-login8.xyz/why_my_battery_is_draining_so_fast_iphone_6sdz2tw.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
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/96735319530.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/trade_barrier_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbb5b2a-b9a8-47d9-b9b0-7234e5957e71/davofaxizugaw.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/78931969364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225f8515-f428-473b-8baf-76ca3881f682/togux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e701de23-7bcb-4980-a060-e34bb17c0bf7/how_to_stretch_strappy_high_heels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9fd7082-32d7-47b8-ad55-fd263934c2fd/what_age_uppababy_rumble_seat.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/mexodizivevemaxabu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000223d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x223D0 7744 bytes
SHA-256: b41e861ea97b2f204351ec3a14eaf36dede8976c7680b431b28d10bdab057f87
font_01_sfnt_off00023dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23DFD 4980 bytes
SHA-256: c9cfba3ba369cf12f04035bf7500da2fd4e39a7bcd766439404ecdae376521be
font_02_sfnt_off00024f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24F14 14792 bytes
SHA-256: 1359f1f8ea0847b72e98c9a68c626a10f37eba0bdbc418847a2e6e0e36a10df1
font_03_sfnt_off00027f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27F13 16392 bytes
SHA-256: 7b19389f88c8251b0e689923f779996cae1f2dddd2410a6ddd547e2612f54874
font_04_sfnt_off0002950f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2950F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
font_05_sfnt_off0002a30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A30F 3508 bytes
SHA-256: 0f9d2bea85436367a6bffaba324942fde1f7fed665f8de19e791696542efb120

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