Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6e145901043d45…

MALICIOUS

PDF

77.5 KB Created: 2021-06-03 06:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 54ebaabbb4c668f8b1f1f3545f33899a SHA-1: 5633b08497a54386f75dbaee2dc36ec338904b3c SHA-256: cc6e145901043d455f5d859f79d31fa88fab4471c13cf91729fb07abdda454f8
246 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://febavezexiwajo.weebly.com/uploads/1/3/4/7/134703432/makasatufilagim-xiral.pdf.
  • 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://laborke.ru/pbw?utm_term=how+to+get+the+new+roblox+menu+2020 PDF link annotation
    • https://febavezexiwajo.weebly.com/uploads/1/3/4/7/134703432/makasatufilagim-xiral.pdfIn PDF document text
    • https://fafapiponuge.weebly.com/uploads/1/3/4/6/134692005/nosowino-sidutolefile.pdfIn PDF document text
    • https://kadenuwu.weebly.com/uploads/1/3/4/6/134674874/rodawo_gokujile_ruzaxudiniw_tijozezotebifi.pdfIn PDF document text
    • https://rujapunilibufig.weebly.com/uploads/1/3/4/7/134713438/8275495.pdfIn PDF document text
    • https://vixikubinimagap.weebly.com/uploads/1/3/3/9/133997110/fesobu.pdfIn PDF document text
    • https://meripowubizaj.weebly.com/uploads/1/3/5/9/135959363/8152079.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/8462839.pdfIn PDF document text
    • https://vejiledulibona.weebly.com/uploads/1/3/4/3/134318828/punugofomajep_bolino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470205/normal_60498ef4360cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_6068e2d79666b.pdfIn PDF document text
    • https://judupivaruva.weebly.com/uploads/1/3/0/7/130775992/9653813.pdfIn PDF document text
    • https://zegadakupoxak.weebly.com/uploads/1/3/4/7/134749069/teralubekolizo.pdfIn PDF document text
    • https://lupasunalijifaw.weebly.com/uploads/1/3/4/3/134385939/pawavofoxulujupope.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393362/normal_60017f24e438d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b4236b-f27c-4234-b846-eb8fe50f6eb5/pentair_cva-24_valve_actuator_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f1ce35c-ea3b-4adc-af91-c4901fafe6f4/avital_4113_remote_start_stopped_working.pdfIn PDF document text
    • http://vadibun.pbworks.com/f/3974893943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d250029-5818-4176-9682-1d7aab0de075/2465221646.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/w/file/fetch/144529209/98480349927.pdfIn PDF document text
    • http://savavaze.pbworks.com/w/file/fetch/144460296/informacion_sobre_la_mitologia_romana.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/w/file/fetch/144450252/kuwazefawufifumivaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf6e9e3-a70e-481f-906e-005f51ec497a/8491073137.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF108 5248 bytes
SHA-256: b91e6527cd62502157a1e4704bf6b2c7e8126248c115ae11e0aabc9ab306ec64
font_01_sfnt_off000102d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D3 10976 bytes
SHA-256: e6acbdec58d675d9a250170aa068cc0bc85a86b1a34219d78523f9216b36732c