Malicious PDF — malware analysis report

Static analysis result for SHA-256 7097e9f90390af1d…

MALICIOUS

PDF

80.7 KB Created: 2021-03-20 04:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1529443e1d0f2f23769c6be49e62d29d SHA-1: d5eacc6358d6762d6aeb59183bc8969a721997f2 SHA-256: 7097e9f90390af1dc7164dd2b7c98bc0f4f1fdcb2d02872b87db018845ded0e9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous external URIs pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs further supports the attack pattern of leading users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=what+does+dynamic+flexibility+mean PDF link annotation
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/fasebeg.pdfIn PDF document text
    • http://menbp.online/dotuwetodibafugekezd8ixe.pdfIn PDF document text
    • http://front-glass.website/bdo_online_application_form_2019jjc4x.pdfIn PDF document text
    • http://gbarb.me/brawl_stars_mod_menu_android7yqh7.pdfIn PDF document text
    • http://zahlungsservice-ch.site/como_se_defender_de_ataques_verbais0e9uy.pdfIn PDF document text
    • https://kusuxifitumaka.weebly.com/uploads/1/3/4/5/134593182/ruwomaminan.pdfIn PDF document text
    • http://static-get.top/833549955423j9a1.pdfIn PDF document text
    • https://sunuxima.weebly.com/uploads/1/3/5/3/135324667/rewadopimuler_gutaw_lolunaxedatu.pdfIn PDF document text
    • http://tekdouche.xyz/history_of_kashmiri_panditsmign3.pdfIn PDF document text
    • http://mebelintera.ru/20089030959b1pgb.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/fuxitawurilum_wodatik_fozatakakilolat_wixukoduzitilaj.pdfIn PDF document text
    • http://xusibuvuzos.22web.org/27922857415.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389370/normal_60092429ee54b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452392/normal_5ff0a673b4ea7.pdfIn PDF document text
    • https://garizoruzaxa.weebly.com/uploads/1/3/3/9/133986237/mesigewimudebit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geluzejezi.epizy.com/vegexeforutuvexu.pdfIn PDF document text
    • http://vosivasagibil.epizy.com/himnario_cantos_espirituales_iglesia_de_cristo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/149fde15-f8ec-4150-badb-24cfc2877f97/98_lexus_es300_headlight_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6500aa56-32b8-4058-bb95-50a5e7497a8c/reset_canon_mp250_printer_cartridge.pdfIn PDF document text
    • http://nukowuvitog.epizy.com/aircraft_performance_and_design_anderson_free_download.pdfIn PDF document text
    • http://lawigut.rf.gd/how_to_use_omron_blood_pressure_monitor_cuff.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545be6fe-ec6b-499b-b799-2e61646b0c0d/kohler_a112.18.1_shower_head.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_off000100c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C1 5488 bytes
SHA-256: c90cfed85ab22c48cdfbcc4ab84e47a023d71aeacc58cd6e63927b434683d3c2
font_01_sfnt_off00011361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11361 9928 bytes
SHA-256: c6064e614be97b39a6185fddedbb4fb38f8f783b6bcd7b8230080cdd0c33f0ae

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