Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53a4263f46ecc3a…

MALICIOUS

PDF

80.3 KB Created: 2021-05-10 12:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 47a6f4df7db6370ab4f0e726b6827eca SHA-1: b449e09b1a5c97cb7754f562e506a19e9650de07 SHA-256: a53a4263f46ecc3aa5a1c7979a57e0fed0b75ec0e63bc34860e404cb677eb60c
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. The document body and extracted URLs suggest a phishing lure related to printer driver installation, specifically mentioning 'canon pixma mg3520 wireless printer'. The presence of numerous external URIs, many on disposable hosting, further supports a campaign distributing malware or conducting phishing. No scripts were extracted, but the PDF structure and embedded URIs are sufficient to infer a malicious download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/strik?utm_term=install+canon+pixma+mg3520+wireless+printer PDF link annotation
    • http://mihetos.xyz/45687835445lkwym.pdfIn PDF document text
    • http://canonsburglake.org/71289564940xbbmo.pdfIn PDF document text
    • https://cdn.sqhk.co/furikute/jjjahaV/slick_slime_sam_barbie_doll_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/hgjeKgg/best_selling_slayer_album.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/1103488353.pdfIn PDF document text
    • https://cdn.sqhk.co/misusulebix/XihsjeD/bupavozerozazaxajubin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_60258c5531755.pdfIn PDF document text
    • http://fresh-ita.fun/hewlett_packard_puerto_rico_aguadillalk1c1.pdfIn PDF document text
    • http://levelupguild.com/diccionario_de_psicoanalisis_laplancixjvy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391649/normal_6061fde7dc05d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_605c082641975.pdfIn PDF document text
    • https://mefutegisudaxat.weebly.com/uploads/1/3/4/3/134350432/909fce7c71.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/zawani.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/wukujiwaruvibix-zakenorupes.pdfIn PDF document text
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/c98667.pdfIn PDF document text
    • http://freshmind.net/74295022545rbd92.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/BjcoibY/final_rally_extreme_car_racing_mod_apk.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://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_41d719d993ab46ff8f3eae94a180ab10.pdf?index=trueIn PDF document text
    • https://721ea522-a1f6-4523-903e-24b3c8014629.filesusr.com/ugd/5a834c_2796e2b21e4c44f188f935586606ef0d.pdf?index=trueIn PDF document text
    • http://jowawaba.atwebpages.com/pabexixibaxeridukakedujow.pdfIn PDF document text
    • https://fea50346-ab34-4b67-843e-90a6383c4983.filesusr.com/ugd/bf678e_dac49f88dbc04609b831e899da18f584.pdf?index=trueIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_5e884eb3d2e7480d9097f56b9269ff7a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4E 5700 bytes
SHA-256: 7463c44b5bf9147209912d1c9899cbe2064e27f55d82140f866ddfd2fb439bb9
font_01_sfnt_off000100ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AE 10828 bytes
SHA-256: 8ab802460d5e35b0468ee64a01550b51b3ada8bb7d86563c18e99e723ea7b829
font_02_sfnt_off00012583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12583 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f