Malicious PDF — malware analysis report

Static analysis result for SHA-256 3670043b075763d8…

MALICIOUS

PDF

72.4 KB Created: 2021-02-12 04:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3b00d54209b3512c64d39c2b144f66c5 SHA-1: 21806980d5f407b45abf903446c4c4eb707258f8 SHA-256: 3670043b075763d8c5de0f6dc71a9cab03bffbcea856afafe007a4006027b0b0
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are hosted on disposable domains, indicating a link farm or SEO spamming operation. The embedded content suggests a lure related to "Insignia tv code for jumbo universal remote" to entice users to click on these links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=insignia+tv+code+for+jumbo+universal+remote PDF link annotation
    • https://nadenekaf.weebly.com/uploads/1/3/0/7/130739264/lejalebomox.pdfIn PDF document text
    • https://misetibu.weebly.com/uploads/1/3/1/4/131438078/fuvekavuwojavor_wujukaw.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/hj7XhgI/qr_code_scanner_online_jio_mobile.pdfIn PDF document text
    • https://nopovufarake.weebly.com/uploads/1/3/1/3/131379277/404187a70e661.pdfIn PDF document text
    • https://divupamafotot.weebly.com/uploads/1/3/0/7/130739309/42427.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367952/normal_5fe4041526ac5.pdfIn PDF document text
    • https://tazojowilojema.weebly.com/uploads/1/3/1/4/131406386/0e2fa1.pdfIn PDF document text
    • https://senugosuka.weebly.com/uploads/1/3/1/4/131454109/fijolekuxew.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
    • https://s3.amazonaws.com/gizonukorad/mawasizupivazavude.pdfIn PDF document text
    • http://wopaxigaromuf.epizy.com/do_re_mi_sheet_music_with_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/1440415249.pdfIn PDF document text
    • http://jedigosegukigif.rf.gd/91412633018.pdfIn PDF document text
    • http://sisuraregimu.rf.gd/four_times_that_night_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/blank_page_word_to.pdfIn PDF document text
    • http://wisubiko.rf.gd/vekesa.pdfIn PDF document text
    • http://risumipekalur.rf.gd/81569880835.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19A 5436 bytes
SHA-256: d3a5c68f1cb5efd09b2d43c8504185add94e72429d2c7a85ab4ac2b3121ce2a7
font_01_sfnt_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 9884 bytes
SHA-256: 57ff4214f51d386779cbb57536b71b303214929f077a2def29334b2ba9a5bc02
font_02_sfnt_off000105c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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