Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa6ffbed058e839…

MALICIOUS

PDF

85.2 KB Created: 2021-03-09 05:58:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9edc247a989f4667ed7588130bb3592a SHA-1: 954e09799a7fcc3cd348094bf3c2515be396f36a SHA-256: 1aa6ffbed058e83987de0ba7c9e929fd7f8be9c3b8897ca853a81ced0f572963
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to external websites, with one URL specifically appearing to be a search result lure. The document body is heavily obfuscated, preventing a clear understanding of its direct intent, but the overall structure and heuristic firings suggest it is designed to redirect users to malicious sites.

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://golowaki.ru/award?keyword=catalytic+cracking+technology+pdf PDF link annotation
    • http://xaraxag.mypressonline.com/luzedimixoworaxujegog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392667/normal_5fefa9154bfd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408481/normal_5fec7d2c706a9.pdfIn PDF document text
    • https://foluxafan.weebly.com/uploads/1/3/5/3/135397430/931680.pdfIn PDF document text
    • http://axecheat1.xyz/zofomaxabig95b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_600f72b6470fd.pdfIn PDF document text
    • https://lobixeximoruse.weebly.com/uploads/1/3/5/3/135319822/nitaroxebatiw.pdfIn PDF document text
    • https://latowinu.weebly.com/uploads/1/3/4/5/134508675/maxap_luvakolar_fiwisezoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_602c1b8d1c1e2.pdfIn PDF document text
    • https://lirobepofuneve.weebly.com/uploads/1/3/0/7/130740173/fa5638ee5011f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_602f7e097b7ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_602c03b71a797.pdfIn PDF document text
    • https://sotezogurew.weebly.com/uploads/1/3/2/7/132740991/6851497.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404964/normal_5fced6c47e486.pdfIn PDF document text
    • http://cosmicgig.com/sujesitajufiwiwilef1twp.pdfIn PDF document text
    • http://keepxufi.space/dupont_corian_sheet_price5zl3o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477386/normal_5fcac6b96ec1c.pdfIn PDF document text
    • http://beautysale.site/programmable_logic_controllers_4th_edition_by_frank_d_petruzella5hcpx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_601ad343c3905.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/the_definitive_guide_to_java_swing_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e72c81b-e9d6-48ec-a5fc-79c6f3606e23/mofupixatetabiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3ed24a-33b5-4f96-b36e-2bc35d55e3f8/whirlpool_duet_sport_washer_error_code_sd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f04dc23-1d84-473a-be86-8335dcfe82e0/ragexaza.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_off000110a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A5 5312 bytes
SHA-256: c388b76680b6a5e32f1a3664b1e9fd5c3cd598c5b4277ce84b0ce0866adb3fa5
font_01_sfnt_off000122b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B8 10840 bytes
SHA-256: f0680b5a69ae3407b34a423989e22888bde01d373e5dd62e52b92bca28dbe980

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