Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c0bd585aa42814…

MALICIOUS

PDF

82.6 KB Created: 2021-03-11 04:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 77e3ebca9fd923642bab9866cffd4a75 SHA-1: d891550f401f6f4cd893dcf193b396c4e5335b8b SHA-256: d4c0bd585aa4281484a278f899f36f802eee6eed450deddede2417651f089086
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing/trojan. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://maypoin.ru/123?utm_term=formation+chaudronnier+afpa+pau PDF link annotation
    • http://jasazotinalol.mygamesonline.org/42489957310.pdfIn PDF document text
    • http://laitlabs.pro/que_es_el_enfoque_educativom20z1.pdfIn PDF document text
    • https://lanapovo.weebly.com/uploads/1/3/1/4/131437145/5040410.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447487/normal_5ff2ac19c0f9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464715/normal_601e6b9e0828f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447649/normal_6000ae4c48b50.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/fjdhdge/73721928168.pdfIn PDF document text
    • http://fb-pageunderreview.com/55355871423409tx.pdfIn PDF document text
    • http://christinaanddavid2019.com/55881962591xooka.pdfIn PDF document text
    • http://zokiwedilar.mypressonline.com/stack_cup_drinking_game_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/uhgj4S7/reversible_reaction_definition_ks3.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/2000_ford_ranger_steering_wheel_cover.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/38817850327.pdfIn PDF document text
    • http://deutschebank-meine.com/complementary_feeding_guidelines_whorx5ka.pdfIn PDF document text
    • https://cdn.sqhk.co/puxovijodazu/gcd0CgL/xeviwuxaduzapuxugud.pdfIn PDF document text
    • https://ruwixotuso.weebly.com/uploads/1/3/4/1/134131383/zutiru.pdfIn PDF document text
    • https://cdn.sqhk.co/vurikede/oGmigjg/writing_worksheet_for_grade_1.pdfIn PDF document text
    • https://daradila.weebly.com/uploads/1/3/1/4/131438164/1169984.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/chhh4Pe/xawigukamobinazopu.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/belapawerezuju/visovevobirizitar.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/tafulet.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/adivinanzas_biblicas_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/wotuk.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00B 5140 bytes
SHA-256: 174767099b24d7e2d1e9e8e48221e32b1abfeda9f4fac837f0e8d80fc0888cbd
font_01_sfnt_off0001015f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015F 11460 bytes
SHA-256: d48658b3a4c8909b63b34c48cbdf03b92be3ee4d517077453c778f0138b57332
font_02_sfnt_off0001277a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277A 16208 bytes
SHA-256: 22e3ed72ec786726e24aeec7aff45d373814b70caf4fc246d2ab4bb179c318f6

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