Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d33409c8e4cb27…

MALICIOUS

PDF

84.9 KB Created: 2021-04-07 03:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 860ae222afc187a4ce15eec544150559 SHA-1: 26416000c6db270b2578438d5a73f381715a957c SHA-256: e3d33409c8e4cb276c103bfbf56364d7304dab57ed5e9b1d1cfb24b2ff5ab9fc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The primary URL, 'https://soxebez.ru/award?keyword=peligro+los+aditivos+alimentarios+pdf', suggests a lure related to food additives, likely intended to trick users into visiting a malicious site for phishing or to download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=peligro+los+aditivos+alimentarios+pdf PDF link annotation
    • https://cdn.sqhk.co/dulunukosep/lijgg2w/can_t_be_erased_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476924/normal_5ff0c9096d782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_6009efa5b70cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447271/normal_5ff42a21f0b8a.pdfIn PDF document text
    • https://cdn.sqhk.co/datimemovuko/wia5BCG/xalam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402932/normal_60081b3c671b4.pdfIn PDF document text
    • http://bevasesebesed.iblogger.org/dbf_format_file_open.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/378072.pdfIn PDF document text
    • https://gadikidaju.weebly.com/uploads/1/3/1/3/131379663/1997576.pdfIn PDF document text
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/d46efdf6164.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/XhKfia7/58359974959.pdfIn PDF document text
    • https://fabuxitewuf.weebly.com/uploads/1/3/4/3/134349615/dd59503f11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_600a7bb0dff47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_601ecfa042574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_602594e0f07cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500897/normal_600abb3c64329.pdfIn PDF document text
    • https://cdn.sqhk.co/deloreba/D7xjChe/xinazevafalikixenezomader.pdfIn PDF document text
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/128641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_604f11f5e9925.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibubatovavav.atwebpages.com/tizijajamijimavalili.pdfIn PDF document text
    • http://dinoxisajuz.rf.gd/pixura.pdfIn PDF document text
    • http://zilisidojaze.myartsonline.com/celula_bacteriana_y_sus_partes_y_funciones.pdfIn PDF document text
    • http://savekuf.rf.gd/b._lit_tamil_1st_year_books.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_off00010ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB3 5424 bytes
SHA-256: 0f60beb4050119a207dda4de715cabc9992406b70cdb8a2e601ba098576351b7
font_01_sfnt_off00011d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D19 12084 bytes
SHA-256: 9c548a2e3377290fe0647da67422441539315ed1b31326435694e5dbf53f8ff8

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