Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78b0318ac714e1d…

MALICIOUS

PDF

107.5 KB Created: 2021-03-22 01:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6d2400d27ba85cd272443f11eb0e0ff0 SHA-1: 7d714b530f45a86c72dc75121f216c4d85aab7dc SHA-256: b78b0318ac714e1d0178faa716839d60d008eb0fc2307faa04e420d96a37f097
156 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely intended for phishing or malware distribution. Heuristics indicate a link farm and a ML classifier flagged the PDF as malicious. ClamAV also detected it as a phishing trojan.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/wix?keyword=stick+city+rpg+cheats PDF link annotation
    • http://trysucre.pro/how_long_does_it_take_to_learn_algorithmic_trading7hbvt.pdfIn PDF document text
    • http://fufumizajo.22web.org/lupowenuvufelife.pdfIn PDF document text
    • http://ompala.store/cva_wolf_stainless_steel_barrel8b7nb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/makita_router_trimmer_guide_bush.pdfIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_4e5e07bd459a450eaf6c51b9b2db208e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xujitezu/desigamelovabot.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/fusiform_aneurysm_aorta_ct.pdfIn PDF document text
    • http://wutaletuf.rf.gd/webasto_heater_code_f03.pdfIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_ab1b8ccfb050402bb39f45014aae567a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nupotukig/affidavit_of_adverse_possession_form_california.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/jamusobifudotakuzevut.pdfIn PDF document text
    • http://diwomojexe.rf.gd/consumer_reports_hearing_aids_2017.pdfIn PDF document text
    • https://a0e9597c-cfbb-4fc1-b0e0-47ed6411b148.filesusr.com/ugd/24269e_e92d5d825e994eb08504df0fcfdf1d4c.pdf?index=trueIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_1b98fe67aed34175ab622829cbd14082.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/english_chat_practice_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3a0fdf-710a-4677-8b28-ee10ea8eec75/84978244033.pdfIn PDF document text
    • https://0f939073-77d1-4307-aaa8-42539c8515e3.filesusr.com/ugd/85c9df_ac19296e33c24590b6e66cb78961155a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/jogupex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3d09d1-274d-40c5-9d5e-5e752d9dc3fa/78615598340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e86f0c20-9110-462f-8474-af06164b5b8c/razazinozoga.pdfIn PDF document text
    • http://maguval.epizy.com/texas_car_title_transfer_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/visionpro_iaq_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b3eb66-9001-4232-8e7c-b4fdc489b546/monster_vape_labs_pmta.pdfIn PDF document text
    • http://zulewuf.rf.gd/gudelapopid.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_off00016674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16674 5432 bytes
SHA-256: 3118b64e192070aa55ae1e43b4b49c38d7b891c87e84e5142c12a33964686652
font_01_sfnt_off000178f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178F3 11592 bytes
SHA-256: 2f8c9968263a0eb92c3d3697a67e75ffd9ae21915b68c21fc72322a858c0cf0b

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