Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00bd007d4b22750…

MALICIOUS

PDF

74.2 KB Created: 2021-03-17 00:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f863627dbe21b867dae42cb8328b01ba SHA-1: 51e551264c11dcc30d1a2366c8e57415622c3dd3 SHA-256: a00bd007d4b22750293018a3f38d97f5eb121ee5755cac6a4cc6cf30e88a4c34
146 Risk Score
Tags
free-cdn-ebook-manual-lure

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 a callback-phone (TOAD) lure. 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 0.9998

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 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.
  • 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://midufefew.ru/wix?keyword=persian+rug+cleaning+newbury+park+ca PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388283/normal_602307860cf48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_60512cafbe2df.pdfIn PDF document text
    • http://opros.xyz/999025964lax2d.pdfIn PDF document text
    • http://goduvide.22web.org/blackberry_picking_poem_answers.pdfIn PDF document text
    • https://nanagupuwaxa.weebly.com/uploads/1/3/5/3/135322083/4559607.pdfIn PDF document text
    • http://instapriz.online/how_to_graph_on_a_ti-30x_iissast6.pdfIn PDF document text
    • http://urologo.store/das_feriados_en_mxico_2020yks0x.pdfIn PDF document text
    • http://pogadai.xyz/50354592814dm31x.pdfIn PDF document text
    • http://normab-id.com/cuales_son_las_clases_de_comunidadu3cfh.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/6564510.pdfIn PDF document text
    • http://8bitbeardsco.com/skycaddie_gps_watch_battery2txyu.pdfIn PDF document text
    • http://daimontimur.org/3880092862804dnt.pdfIn PDF document text
    • http://hookup681.site/lagisafotixewevinuzoopjp3.pdfIn PDF document text
    • https://sobapeseg.weebly.com/uploads/1/3/1/0/131070394/bixemigogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dakezimipage.epizy.com/que_es_anemia_falciforme.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/gugowexinomigejofadal.pdfIn PDF document text
    • http://gamutazuzores.epizy.com/kubogerukopabi.pdfIn PDF document text
    • http://kojeziponoduv.epizy.com/sql_interview_questions_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/73673288596.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_off0000e476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 5500 bytes
SHA-256: 553f1e5678795915c4d512e4cbf7f98897dd3421db0bc55b90b58e9e3e6bd447
font_01_sfnt_off0000f751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF751 10700 bytes
SHA-256: b048a5149c1225a6ddbdbc936b5417baf57e2dd8f39c9f752feef3c04dd72e2c

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