Malicious PDF — malware analysis report

Static analysis result for SHA-256 7625d41d8d49140d…

MALICIOUS

PDF

100.4 KB Created: 2021-03-05 06:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06a2412f688c2f2ab01f48383bd060a7 SHA-1: 6eb50ec9c75ad0253b0d5769b3ab316195a6d423 SHA-256: 7625d41d8d49140dea1f874310f783164dfd4b9e2143261a46af11d7196f00f4
166 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links, including one that is invisible and points to a domain designed to mimic a legitimate download. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://gimoguvi.ru/wb?keyword=how%20to%20practice%20verbal%20reasoning%20tests PDF link annotation
    • https://cdn.sqhk.co/movijomo/AyvKdgh/bloons_super_monkey_2_upgrade_guide.pdfIn PDF document text
    • http://duxasavorin.22web.org/fluval_fx6_hose_size.pdfIn PDF document text
    • https://mezobemubuzopos.weebly.com/uploads/1/3/3/9/133997151/b5dec.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/savaramokupezuw-pigudasabi-gakixutulipex.pdfIn PDF document text
    • https://xadebunurag.weebly.com/uploads/1/3/1/4/131454816/b456f5039b1.pdfIn PDF document text
    • http://bufizuz.22web.org/gamit_adivasi_rodali_song.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/ehfohfN/super_psp_emulator_pro_apk.pdfIn PDF document text
    • http://loginwithfb.site/lenovo_y500_drivers_for_windows_xpd3asl.pdfIn PDF document text
    • http://am-sound.ru/griswold_inn_storeeci2y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/813c2915-f180-4dc3-9a45-0555870be9b4/norcold_rv_refrigerator_error_codes_no_fl.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/big_green_egg_large_cover_price.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/22740908106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276f06a2-d48c-42e3-9475-d779897d2536/dabejuxilotebi.pdfIn PDF document text
    • http://jipuzekas.rf.gd/63876815969.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/5_tab_index_divider_template.pdfIn PDF document text
    • http://xowirife.rf.gd/62623978579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e35395e-9362-44b5-b1b8-0a8a8ebc4eb0/how_do_you_find_gps_location_on_google_maps.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_off00014de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE7 5356 bytes
SHA-256: 4cbce55af5bf704fa37d507771f25127d68b80af2e8549a9a4c5d5ead8298463
font_01_sfnt_off0001603e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1603E 10716 bytes
SHA-256: 94efe14ae34345f38657d37c295a60ac33d2cd7215c594ac6c4f0a37db2eeefc

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