Malicious PDF — malware analysis report

Static analysis result for SHA-256 397ebac98320d279…

MALICIOUS

PDF

66.4 KB Created: 2021-01-24 11:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bf0ece3262de3f95ef26fa7150167150 SHA-1: 8344f174aada76669b8939c2a3b360f671adbce0 SHA-256: 397ebac98320d27998319cae2481a6dee684e83914a1dfb599bbce2f5199df8d
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results or lead users to malicious sites. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or scam pretext, while the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings confirm its malicious nature. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially harmful content.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafffi.ru/aws?utm_term=deveraux+beach+marblehead+surf+report PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486350/normal_5ff94dd90602f.pdfIn PDF document text
    • https://fusodozot.weebly.com/uploads/1/3/4/0/134096428/e5789c726ee026.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484612/normal_5ff8311e0f7ae.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/jegeid7/borezezikaraxenazizigowe.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/barajoziv-xaxuxovovemi.pdfIn PDF document text
    • https://bodumiwi.weebly.com/uploads/1/3/1/4/131406735/defas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489834/normal_5fd29f58cec95.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/gxHjeia/marshmello_costume_amazon.pdfIn PDF document text
    • https://bixixadapi.weebly.com/uploads/1/3/5/3/135321875/jokipiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416321/normal_5fff11e1e7221.pdfIn PDF document text
    • https://rupibofog.weebly.com/uploads/1/3/1/6/131607232/1092784.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/pesetufavo/togisevoku.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/dungeon_siege_2_combat_mage_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/how_to_add_guided_access_on_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/jupinanuvogokerugon.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/genetic_algorithm_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/gatiputif.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/sibipasidepebaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/12033834034.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/gmail_account_bypass_apk.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_off0000c7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DC 5660 bytes
SHA-256: 3198b75d8ad0746cbe857eb87380fa43f1578cb41032d242ff121ea7d10d6d9b
font_01_sfnt_off0000dafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFE 9804 bytes
SHA-256: a75248802de396878f2628d083c4bf1d4f672310b249682e22ec6ea1d122eda1

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