Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac442f1af032c4c4…

MALICIOUS

PDF

130.1 KB Created: 2021-04-21 04:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bd544e83069a6ba55632a8686a6c0fe0 SHA-1: d66abbfe2990664b277bd0802b4595181040b075 SHA-256: ac442f1af032c4c4a2bf595f4e8fe5169074ccf868efeb9c0ac420e951517d2f
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by both ML classification and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs, such as 'https://seumenha.ru/strik?utm_term=ab+powerflex+700+manual', are likely used to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall structure and URL distribution strongly indicate a phishing or malicious redirection attempt.

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://seumenha.ru/strik?utm_term=ab+powerflex+700+manual PDF link annotation
    • https://narapafugoziror.weebly.com/uploads/1/3/0/7/130775848/864171ca475833.pdfIn PDF document text
    • https://zadidiboz.weebly.com/uploads/1/3/5/2/135295834/9675495.pdfIn PDF document text
    • http://vpntop.info/49623792633rwp16.pdfIn PDF document text
    • https://takixesa.weebly.com/uploads/1/3/4/6/134621412/6e06984e56.pdfIn PDF document text
    • http://precabinets.xyz/anomalias_congenitas_del_aparato_reproductor_femenino9vn8y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388426/normal_606131d12b104.pdfIn PDF document text
    • https://rinavupitaf.weebly.com/uploads/1/3/1/1/131164375/sujipusevoduruzopoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393019/normal_603e58ea8cf15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459466/normal_5fcd377a5de03.pdfIn PDF document text
    • http://affilateapp.online/5497902199iy0ck.pdfIn PDF document text
    • https://gazelavulokar.weebly.com/uploads/1/3/4/2/134265358/1893017.pdfIn PDF document text
    • http://oneitstore.info/29098994572ggzgm.pdfIn PDF document text
    • http://lovemecompletely.com/32237471686c31ev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379363/normal_5fef000dcf456.pdfIn PDF document text
    • http://grenkasalo4.xyz/formation_aide_familiale_ligeyvtqn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417207/normal_5ff6763618cee.pdfIn PDF document text
    • http://1xbets-regs.site/evolutionary_psychology_apa_definitionfpmqf.pdfIn PDF document text
    • http://gonzo-3d.com/16550668866n7swp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_04b53ae72e764d70ac6bdd95a31e2e2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bofake/que_es_calorias_en_quimica.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/lokomitoro.pdfIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_14e196f5dd5c43df9b7bf4e2ff2b71c7.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B03 5380 bytes
SHA-256: 503fd193d058f624111dd4aaddb181cd98be7f01aaa041ed370cbb63b28afa1a
font_01_sfnt_off0001ad1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD1B 1412 bytes
SHA-256: 2621ae85e3060e61d2808ed1c49439c82c1aacb14c690e808a03b7c3c321c95c
font_02_sfnt_off0001b4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4D0 12604 bytes
SHA-256: 9dcebdc482e476f596cba21e5145d2d2cc470a55e5a4a268a8946cfe94829e8f
font_03_sfnt_off0001dfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFAB 18400 bytes
SHA-256: 87c289acbc161e7622aef456b1e4872b9d4ef231dcb155eb09a6293dce63295e

Open this report in the interactive analyzer, or submit your own file for analysis.