Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7cc3770fd939543…

MALICIOUS

PDF

69.2 KB Created: 2021-04-03 03:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d54b531509b51a222a95108febf7d4d4 SHA-1: b7660b2ac7e6d90b7781a4135cb8572b5337742f SHA-256: b7cc3770fd939543d1c3014ef8c34937707dec858e017f235f332d0c648239e6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating the presence of external URIs within the PDF structure. The embedded URLs suggest a phishing or malware distribution attempt, masquerading as a benign document. No scripts were extracted, but the PDF structure itself likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/award?keyword=be+past+simple+exercises+pdf
    • https://cdn.sqhk.co/jokawefezo/5Ezhc2o/10095628372.pdf
    • http://tulidefupevewub.iblogger.org/nonton_film_percy_jackson_3_subtitle_indonesia.pdf
    • https://cdn.sqhk.co/rokabumake/5jeaqgc/download_mini_4wd_legend_mod_apk.pdf
    • http://sefajoga.iblogger.org/23338947379.pdf
    • https://cdn.sqhk.co/duwewofowus/9gkciiI/psoriasis_scalp_severity_index.pdf
    • https://cdn.sqhk.co/rutunidosaw/igahggh/ghosts_in_the_toy_box_song.pdf
    • https://cdn.sqhk.co/duxapotor/vhiFjiA/modify_feudal_contract_ck3.pdf
    • https://cdn.sqhk.co/pezolaje/jijahax/9091941946.pdf
    • https://cdn.sqhk.co/fovipobex/4jfxKWW/tubagiritojewe.pdf
    • https://cdn.sqhk.co/benibavagoge/ahiYijJ/sniper_trickshot_games.pdf
    • https://cdn.sqhk.co/jenireni/bgevxw3/11453448394.pdf
    • https://cdn.sqhk.co/sifomujotaxa/iibiahi/pizunawiniwuguwireno.pdf
    • https://cdn.sqhk.co/rapigufagi/MOrghak/65943331566.pdf
    • https://cdn.sqhk.co/zuxatotukaru/bIjhgg8/rifebi.pdf
    • https://cdn.sqhk.co/lokiwejawe/RMhfhga/used_tablets_for_sale_amazon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e41e2458-4d1f-40b1-a57d-affdcf81f556/vexepi.pdf
    • https://uploads.strikinglycdn.com/files/9f83a53b-eac9-4561-9faa-5114ab6a2016/organic_chemistry_as_a_second_language_5th_edition.pdf
    • https://uploads.strikinglycdn.com/files/c23637ce-0674-444d-9df3-2acf063c814c/how_to_make_a_storyboard_for_business.pdf
    • http://simifumujabiguw.rf.gd/what_is_going_to_an_aa_meeting_like.pdf
    • http://jerovewoxisabu.epizy.com/wanna_one_battle_trip_indo_sub.pdf
    • https://uploads.strikinglycdn.com/files/2e21c67a-c34f-4e87-b40b-bc7b1a8b8cb4/21314479217.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b6.bin
fbb287de9e1aee62080ca89ccfdbd4a1565451b912b6df90d3989a43fcce8634
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B6 5420 bytes
font_01_sfnt_off0000e610.bin
599e40d77b22f7286231eb928e9df756ddb4e12f9c3e42f0d25b1277856b4b4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE610 9864 bytes