Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c78d977f4a574cf…

MALICIOUS

PDF

87.0 KB Created: 2021-03-24 10:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c3466c06ddf99594cf1e189beb71fdcb SHA-1: 9ae565ad59360ecae512e351a83d66748952e207 SHA-256: 7c78d977f4a574cf1265e16e36522be68f63c1e3dfeb40fa96e2a820171cac4d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://soxebez.ru/wix?keyword=dead+man%2527s+headband PDF link annotation
    • http://losqutoq.online/70780691971lvx8w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488581/normal_601c0435c6f0a.pdfIn PDF document text
    • http://zikajewuz.22web.org/24744387393.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/4223654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_600b5e24d14e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410459/normal_5fc581cbd7a40.pdfIn PDF document text
    • https://fafiwopadatomag.weebly.com/uploads/1/3/5/3/135326984/femugagifi_xazex_gojakoluli.pdfIn PDF document text
    • http://pozebesibi.22web.org/can_drivers_license_be_renewed_before_it_expires.pdfIn PDF document text
    • https://vowabogebem.weebly.com/uploads/1/3/0/7/130775978/f80e03caa62b9.pdfIn PDF document text
    • http://sayseedokg.com/jejowidekbv8vw.pdfIn PDF document text
    • http://stakingyfi.com/200845279777d97i.pdfIn PDF document text
    • http://vvd.bar/poulan_p3314_spark_plug_locationi3mfv.pdfIn PDF document text
    • https://niwanuve.weebly.com/uploads/1/3/1/4/131406473/jiviliwimuwano-paxalekirud-xumijawim.pdfIn PDF document text
    • https://sanakutubifave.weebly.com/uploads/1/3/4/8/134849958/dovagonorixo.pdfIn PDF document text
    • https://vipagazowarofi.weebly.com/uploads/1/3/4/6/134685611/67b321.pdfIn PDF document text
    • http://m-laskin.ru/6652928777ghfeq.pdfIn PDF document text
    • http://vomojagibolib.iblogger.org/gadum.pdfIn PDF document text
    • http://carishr.com/86655959177nsjl2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zenejifawulo.epizy.com/munadupujix.pdfIn PDF document text
    • http://budobilososuw.rf.gd/kabemeja.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_off00011953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11953 5108 bytes
SHA-256: 0775d8415b41bf1b8c60c02312c11ca148e5cce3cdf82606dfe30c255df0cd0d
font_01_sfnt_off00012a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A97 10672 bytes
SHA-256: 7778d1a655d87c09ddd737850841e4fd2da69365656b06782a87f100ca13aaba

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