Malicious PDF — malware analysis report

Static analysis result for SHA-256 846986b36e2ee1a6…

MALICIOUS

PDF

75.7 KB Created: 2021-03-22 03:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a41bc826aff681a2c89e5fa22a774739 SHA-1: 58d16046e88bf82c17f2b826a13a1045fedefe8d SHA-256: 846986b36e2ee1a63609318a46641a12cb5ef92d088a4aab01c1764c4a538ced
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a disposable hosting domain, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/wix?keyword=analytic+trigonometry+precalculus PDF link annotation
    • http://mapotilij.mygamesonline.org/base64_to_java.pdfIn PDF document text
    • http://terugate.mypressonline.com/18484247144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444884/normal_6034dfdf72173.pdfIn PDF document text
    • https://cdn.sqhk.co/mekoposa/eBAP17O/world_war_3_zombie_waves_mod_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_60461ae6e0578.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/design_metrics_in_software_engineering.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5febaae3b6783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459645/normal_5fdbbe48c2983.pdfIn PDF document text
    • https://cdn.sqhk.co/ligilitojob/TeJ3ObX/85433369778.pdfIn PDF document text
    • http://winnerslm.space/62280879466pgdpk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_60124eb199839.pdfIn PDF document text
    • http://moneyindia.site/book_review_the_secret_rhonda_byrne389h3.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/gcu15DU/novo_cinemas_qatar_careers.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/8uhboQK/reclaimed_roof_tiles_near_me.pdfIn PDF document text
    • http://fineagencyy.com/17641763005c4rou.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27914d7c-3781-48bf-9856-525b464149f5/what_can_i_do_with_a_100_psi_air_compressor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0187ba-5630-45d6-8d93-1f51f247c453/fozibabilinizekojibude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3febbbe3-9209-46a6-b9e2-f04a7f40dff4/can_you_use_a_roaster_oven_to_keep_food_warm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe20cb9-f264-4fc0-97fd-c936b258b70c/the_crown_season_1_episode_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcd689b-c907-49f5-a310-1b5a3ef94683/bijupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3bb60b-2726-4354-98da-54fc1f1a34d2/can_you_watch_twilight_zone_on_netflix.pdfIn PDF document text
    • http://xoxekojut.onlinewebshop.net/brche_zahlenstrahl_bungen.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_off0000e796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE796 5344 bytes
SHA-256: 8d8191465d6ed77dc7d14d1a61cbe4579cd5db0b1fd9a812df3c7062a9449db4
font_01_sfnt_off0000f9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BE 11188 bytes
SHA-256: c1130d5888bf8194c1dd590f28e4de81b4ee25a544a4c51ea04d4ad4d6de67ba

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