Malicious PDF — malware analysis report

Static analysis result for SHA-256 57977ad6b2b03af5…

MALICIOUS

PDF

85.4 KB Created: 2021-04-23 19:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 419c7f6f25cd52c7a415c63c7a67cc70 SHA-1: cbf98bf28a9cce0eb6de06077d3ff213531713f6 SHA-256: 57977ad6b2b03af52711b9b8cbb1338476a06f7d30c999caf0f36984402a46ba
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI and a high-severity heuristic firing for a redirector link, indicating a likely phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a product comparison, potentially serving as a lure.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=tp-link+tl-sg1005d+vs+tl-sg105 PDF link annotation
    • https://cdn.sqhk.co/zujubokave/N21ggnJ/tamil_dank_meme_stickers_whatsapp_ios.pdfIn PDF document text
    • http://fastgetme.online/sisewatiwsrf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422135/normal_6059af164622c.pdfIn PDF document text
    • http://vipinisejes.22web.org/livro_as_artimanhas_da_excluso.pdfIn PDF document text
    • http://ribuvegiruni.iblogger.org/fuzuxufovevorusuwulivar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474723/normal_6014c5045fc5e.pdfIn PDF document text
    • http://prostosite.site/mikuni_vm_manual8np4u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464874/normal_6022e9f0110cb.pdfIn PDF document text
    • http://ufenmac.com/how_to_take_apart_frigidaire_dehumidifierozhq6.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/hShiAIC/pink_pencil_case_target.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gotozorij.epizy.com/what_does_a_medium_sweet_potato_look_like.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/rabbits_fact_sheet.pdfIn PDF document text
    • http://fewatebuvif.epizy.com/common_countable_and_uncountable_nouns_list.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/metformina_500_farmacias_similares.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/hbs_review_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/what_is_systematic_random_sampling.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/questions_for_a_leadership_interview.pdfIn PDF document text
    • http://jurolabadujo.rf.gd/69116912306.pdfIn PDF document text
    • http://kalijumixu.epizy.com/gilabuzusepitige.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF891 5244 bytes
SHA-256: a315c85b2248d5fb58dd82a16e6df361aad9bcf552299d91f95efb820616d591
font_01_sfnt_off00010a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9F 12520 bytes
SHA-256: abf11150d4b2525379b70d850e2699d5b6de60dd02061d0f39c743045bffb6e2
font_02_sfnt_off000132f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F9 16088 bytes
SHA-256: b2ddecaff7e2361bf51021b35f9c014659943b600c4f466cb4656cea9e83b80e

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