Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfd980f96a6cb75…

MALICIOUS

PDF

75.0 KB Created: 2021-03-12 08:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 18f182aeb9597256b2aca572f7c00056 SHA-1: 9ca8131de9789949f0edea93794fe0fa8cc40076 SHA-256: bcfd980f96a6cb750bf439a5001100f1aa01d144d6dab99e57abb889976717e7
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://baarspo.ru/wix?keyword=gta+5+free+download+apk%252Bobb+for+android PDF link annotation
    • https://babujotiju.weebly.com/uploads/1/3/4/7/134751526/deritewi_dilamowes_puguximepuxor_wubiwogilu.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/bunesebopedigobonunu.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/batman_the_dark_knight_rises_full_movie_download_in_hindi.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/vutakogeximufotag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_5fda53cb3ad8c.pdfIn PDF document text
    • https://xupusunozad.weebly.com/uploads/1/3/1/0/131070799/8b8c15aec29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393515/normal_5ff55b21cfde5.pdfIn PDF document text
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/puzowopubuzobejoneze.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/napodumevof.pdfIn PDF document text
    • https://vovopifibinurit.weebly.com/uploads/1/3/4/6/134654598/jixisakesagimo.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/meguwefifunubazakeki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478683/normal_603ef29b3bd46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450257/normal_600fb7bdef4fd.pdfIn PDF document text
    • https://duxetaxegijojem.weebly.com/uploads/1/3/4/8/134870405/pumuzerefixufawug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456387/normal_60449f9f56a4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_fef38434d6724a1eb3425b323d0dc9e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeponowon/tarif_hotel_formule_1_boulogne_sur_mer.pdfIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_fb1ae772c8b64100be358f980bacbfcb.pdf?index=trueIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_78216b6b26b445bc9917abcf4e295107.pdf?index=trueIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_c5d4d155c7844c2f8c0cd89778915798.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/rockola_jukebox_model_431.pdfIn PDF document text
    • http://kibagog.onlinewebshop.net/briggs_and_stratton_parts_uk.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/understanding_magnitude_of_earthquakes_measure.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_off0000e36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 5308 bytes
SHA-256: f75632268cd14a826773a07201959446e6f1c9e0b62392f53514083995ae3617
font_01_sfnt_off0000f5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A6 12736 bytes
SHA-256: 7240563998a15e50b136636384a134d4d8b3967d6c640dfd66f7814b9ef1f9d0