Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b1827f577f9f2d…

MALICIOUS

PDF

78.8 KB Created: 2021-03-21 04:28:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3a780520a3a298e628fdd2dd0ce2a8fb SHA-1: b70723b8e68010217336676d948522bc3d7ae7a7 SHA-256: a7b1827f577f9f2df845125cf0629f0c6ce1a90ac2cc451cb06f7f90d3713e03
136 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body and heuristics point to a lure related to the 'Unity asset store download stuck at 0', directing users to a suspicious URL. This suggests an attempt to trick users into clicking malicious links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://nipisod.ru/strik?utm_term=unity+asset+store+download+stuck+at+0 PDF link annotation
    • https://cdn.sqhk.co/xugosovemi/hcihh6D/wordpress_plugins_free_list.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/32nTphg/27034865686.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/f1s6ijr/73899318697.pdfIn PDF document text
    • http://kawojoxakinit.22web.org/kozoxorifuw.pdfIn PDF document text
    • https://cdn.sqhk.co/tibapopedeka/gdhfljf/posigalabiwoza.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/j8jaqjb/sword_knights_idle_rpg_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/gjbhchi/online_document_converter_to_jpg.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
    • https://s3.amazonaws.com/jefobexapulow/what_size_windshield_wipers_do_i_need_for_a_2018_hyundai_elantra.pdfIn PDF document text
    • http://fitewuvo.rf.gd/kuxazanoke.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/chammak_challo_song_mp4_hd.pdfIn PDF document text
    • http://fikakoba.rf.gd/25525368585.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/b._d._o_full_form_in_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/belmont_primary_school_harrow_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/53555061105.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/how_to_reset_rt_n66u_router.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/encounter_shankar_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/adelphobates_galactonotus.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/seluzikadugidamemivono.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/wozizepa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C2 5204 bytes
SHA-256: 192f4ade7d372b2c8b47159db8c0695549815a6a2f033133cd68bf70d205b6ad
font_01_sfnt_off0000f895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF895 11456 bytes
SHA-256: 593d3ec31aa01fc6aeeee96cb8871d822a12c52b004e429d6583b20dc12e38c4
font_02_sfnt_off00011fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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