Malicious PDF — malware analysis report

Static analysis result for SHA-256 179a049739f73a0d…

MALICIOUS

PDF

75.5 KB Created: 2021-03-14 01:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 26d619f8255b6e158a78ed9ab4c039d4 SHA-1: 5fdfe4f12c1654940a13f57c5c4603a44b08fac0 SHA-256: 179a049739f73a0d590303fd634eff31d656435a9df8618a029f10518442a783
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, which is characteristic of SEO link farms or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to distributing malware or facilitating phishing campaigns. The embedded URLs and the heuristic firings for link farms support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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.
  • 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://ponafet.ru/wix?keyword=www.mrdowling.com+fill+in+the+blanks+answers+mesopotamia PDF link annotation
    • https://fojowixejomad.weebly.com/uploads/1/3/2/6/132681658/viweremot.pdfIn PDF document text
    • http://virepidutajal.iblogger.org/supoledumutebirejag.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxojuvef/eqhiJoI/99615691487.pdfIn PDF document text
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/kiwadojaporid-ladudiwivunila-detedaw.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/Bhggegc/46446403060.pdfIn PDF document text
    • https://cdn.sqhk.co/difusivoga/fIEmZw1/rasulunefujuforin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378175/normal_5fccfdf2acace.pdfIn PDF document text
    • https://cdn.sqhk.co/zapoboveje/DDDbUja/old_homesteads_for_sale_in_montana.pdfIn PDF document text
    • https://cdn.sqhk.co/paxelababeg/aaK1igy/giribedukudixabixumujozid.pdfIn PDF document text
    • https://cdn.sqhk.co/nugutobudan/RVcAuNt/66657403485.pdfIn PDF document text
    • https://cdn.sqhk.co/sinewuvemomi/hfqgdic/pinazeretixokekamito.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/giiehcG/events_this_week_los_angeles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_60153c2a212d7.pdfIn PDF document text
    • https://lomivemaj.weebly.com/uploads/1/3/0/7/130739076/baxen_sodademenut.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/hmhaibP/66664386258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475208/normal_60158e688d565.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/zuxikolosuxuga-gaxefozoren-tativugarig.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/hcdgjl3/73591819436.pdfIn PDF document text
    • https://vorujefam.weebly.com/uploads/1/3/4/3/134322124/2410627.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxanupu.epizy.com/el_si_de_las_nias_resumen.pdfIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_5f7fb8fd7f784187b314b065b7f36991.pdf?index=trueIn PDF document text
    • http://lederelinu.rf.gd/the_checklist_manifesto_summary_by_chapter.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_cb62994e038a422383e46a67959a3f28.pdf?index=trueIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_1fc5a188083c4e06b68041b8ca5a3b90.pdf?index=trueIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_c7cbee58de8a46f7bc4a14b8a13dda12.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C8 5908 bytes
SHA-256: 7bffe8b9f48bc37f83f355078fac252e0b84212dbe3bb67412bb5c0c67bfe6ef
font_01_sfnt_off0000f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 10576 bytes
SHA-256: b21a93f4fd054cab7a8b6ab94069c1ae77f2e66625f400bffa0278d948d566d1