Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b8f02bbdc77045…

MALICIOUS

PDF

75.1 KB Created: 2021-05-13 12:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9c9c3674aebd9892916ae5f2c25cee28 SHA-1: 50e002878f0ee49d2e8940b62772300b27c32eef SHA-256: 70b8f02bbdc77045364b298687ce7f8fc28106b153ece8672ca17523b333234a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://jottigo.ru/strik?utm_term=netgear+wn+1000+rp+installazione PDF link annotation
    • http://lejidakoxinetog.mywebcommunity.org/55881385314.pdfIn PDF document text
    • http://zukoxofiro.22web.org/adenoviral_konjonktivit_tedavisi.pdfIn PDF document text
    • https://cdn.sqhk.co/juvekuvop/Khe93xA/wordbrain_2_word_star_research_level_3.pdfIn PDF document text
    • https://cdn.sqhk.co/xiponamoribo/hinjjhd/45085341081.pdfIn PDF document text
    • http://dezimazokuxulil.mygamesonline.org/mappa_bordeaux.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuwimavez/gggfggy/83280289521.pdfIn PDF document text
    • https://cdn.sqhk.co/bazexolareja/ifjc2PR/26113448103.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/is_chevrolet_camaro_2010_a_good_car.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/ighXLjc/british_royal_family_documentary_youtube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muwenujuwup.rf.gd/how_to_reset_citizen_eco_drive_perpetual_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64e40c9a-38e0-4db6-83c4-d0b43b0ad4f1/hp_officejet_pro_8600_plus_document_feeder_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/79774863183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41fba4cc-61be-46ea-8ad3-bcdb0f7c5c08/you_can_heal_your_life_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/camtasia_assets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/yoshino_cherry_tree_information.pdfIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_8fbbc328dced4c5b907418367214e90a.pdf?index=trueIn PDF document text
    • http://texizozajon.rf.gd/tegutij.pdfIn PDF document text
    • http://wumipuxupixak.epizy.com/7064268917.pdfIn PDF document text
    • http://xusapibu.onlinewebshop.net/anemia_drepanoctica.pdfIn PDF document text
    • http://fanalejowegop.atwebpages.com/fejaguvevizukoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00d4a56-2b76-498a-8086-5fe611673353/mofaxetufivixabowok.pdfIn PDF document text
    • https://5f384421-c3d0-4b4c-85a6-d3745974446f.filesusr.com/ugd/40006b_51d7fbf492e54b99b86c3f1deefa469e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f9987e-2fb3-4e32-8060-2d40e2924917/32920837890.pdfIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_d102826c28874792a7bb7e019bd2ec10.pdf?index=trueIn 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_off0000e44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44E 5292 bytes
SHA-256: 095a11a6d3639ea9463be83ad95ec581e91b0127353453e7bf2e00541acd8e9e
font_01_sfnt_off0000f683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF683 11864 bytes
SHA-256: 6dc7251f96b88951ab81292d74c0c8e207917afd15e4bd58fd52563a47e9171d