Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f2010df141acbf…

MALICIOUS

PDF

79.1 KB Created: 2021-05-06 00:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 95a4b01fd5076721a2559a74a25c85a9 SHA-1: 6d9e4e84f2658b52fbc9aab4c3c47fe9274a3e23 SHA-256: d7f2010df141acbf45c6bfe1b283d571125b99bc5cc1817de7d4bfad5fde797e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=fluke+t5-1000+voltage+electrical+tester In PDF document text
    • http://brumbum2.xyz/what_is_the_purpose_of_pandoras_boxjc1z7.pdfIn PDF document text
    • https://cdn.sqhk.co/wigatozaduw/Zhdlsly/97552128128.pdfIn PDF document text
    • https://vajinivokesele.weebly.com/uploads/1/3/5/3/135326698/07884e.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/57053258434.pdfIn PDF document text
    • https://gugibutuxu.weebly.com/uploads/1/3/2/8/132814167/681a1ba9c04.pdfIn PDF document text
    • https://pulolated.weebly.com/uploads/1/3/0/7/130740140/vomesovaf.pdfIn PDF document text
    • http://alcexpress3.xyz/gijedumovb6221.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/ajiAhhf/sims_4_mobile_for_ios.pdfIn PDF document text
    • http://thedefenseforge.com/sample_essay_for_satvd62z.pdfIn PDF document text
    • https://jokenobijejadur.weebly.com/uploads/1/3/0/8/130873794/gegokofudeki-newenok-dixuvoteva-befabadoten.pdfIn PDF document text
    • https://cdn.sqhk.co/wenejusuzixe/dhczieN/madurofevedivofutamula.pdfIn PDF document text
    • https://cdn.sqhk.co/mugetawelumi/PGmPjbq/desetebowevuku.pdfIn PDF document text
    • https://daseguvemorog.weebly.com/uploads/1/3/4/3/134357845/4857184.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/sepsis_fisiopatologia_2020.pdfIn PDF document text
    • http://tuzojexis.mypressonline.com/niwoxike.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nivigiwaragere.epizy.com/panasonic_microwave_repair_centre_near_me.pdfIn PDF document text
    • http://wepatimaleb.epizy.com/explain_the_agents_of_socialization.pdfIn PDF document text
    • http://gekuwixaritaxe.epizy.com/zabramski_cavernous_malformation.pdfIn PDF document text
    • http://mumidukegex.rf.gd/kupanarunanalunutavelike.pdfIn PDF document text
    • http://zevofelajasuz.epizy.com/fijotitigitunafujoj.pdfIn PDF document text
    • http://tositasi.epizy.com/kogidid.pdfIn PDF document text
    • http://tokozod.myartsonline.com/zabufegigu.pdfIn PDF document text
    • http://rebubokinore.epizy.com/chromedriver._exe_for_mac.pdfIn PDF document text
    • http://mifofoxidil.onlinewebshop.net/42882456851.pdfIn PDF document text
    • http://bekelogamaju.rf.gd/78450567139.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB58 5172 bytes
SHA-256: 2b2ef104ce45a80987c730e85d1850a72f3e7eaed8369d39912e606341ae7745
font_01_sfnt_off0000ece9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 1404 bytes
SHA-256: 2e4414792b7449c1ac9fee619ef2d9b51c8421e6efe090465335d9135174bb5c
font_02_sfnt_off0000f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 13168 bytes
SHA-256: cf2e7a82180d27a71fbac90f3b81e7a5ff092a1885f03f761da3db820b43359a
font_03_sfnt_off00011e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E87 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f