Malicious PDF — malware analysis report

Static analysis result for SHA-256 5207b5e487929ba0…

MALICIOUS

PDF

70.9 KB Created: 2021-02-28 08:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a6c16af3469e47b47fa9be1ecd4ee0d4 SHA-1: 80dde9ccd1191731318175d89c1fcdd82c930fbf SHA-256: 5207b5e487929ba0f9dc52dd917d43447257033ded97e1bc99d0897a7534af46
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF containing numerous embedded links, many of which point to suspicious or known malicious domains, indicating a phishing or malware distribution attempt. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting the document's primary purpose is to drive traffic to potentially harmful sites. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=c9+opticore+cool+white+led+commercial+outdoor+christmas+lights In PDF document text
    • http://baliferifopiz.mypressonline.com/71803515465.pdfIn PDF document text
    • https://rijozixofufake.weebly.com/uploads/1/3/4/5/134509282/rotiponevapelobuwev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480886/normal_600b9d03e00db.pdfIn PDF document text
    • https://vixixufabajuwe.weebly.com/uploads/1/3/1/1/131163632/wibexodaroxet-fizaner-bazefo-bubajujodi.pdfIn PDF document text
    • https://mokoxofedig.weebly.com/uploads/1/3/4/8/134891763/gupagutoreboj.pdfIn PDF document text
    • https://ragajepegoxi.weebly.com/uploads/1/3/1/3/131379061/netukosajunapizaroz.pdfIn PDF document text
    • https://wemakevarovafa.weebly.com/uploads/1/3/4/6/134636541/5328387.pdfIn PDF document text
    • https://vuxilimibipemop.weebly.com/uploads/1/3/1/4/131453056/gawatakis_vajej_zizisetelenu_mesudisowegut.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/jowal-gifuvisuda.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/tezude/34017288409.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/lightroom_presets_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/tomb_raider_weapon_parts_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/ariston_60cm_freestanding_oven_manual.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/one_thousand_and_one_nights_movie_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/wegolupivotanunipuno.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_off0000d812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD812 5640 bytes
SHA-256: 0d098bbbbb23f35730c394fa47f95c1fca7c630c208fd789bc2bf91ccd43a22d
font_01_sfnt_off0000eb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1E 10232 bytes
SHA-256: d57763ccbbc17d8f13b21340513c8f7b56d6803505c3c1af06baa8db4f95a796

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