Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e59d43501bca2f1…

MALICIOUS

PDF

69.4 KB Created: 2021-01-20 15:34:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7fccf86a40f629b277d498c8fcfe865c SHA-1: 05b8e4d50de8057e9864c1e5047ee65eee0c2cbc SHA-256: 8e59d43501bca2f161383c27f855c7af01300090ef7b72e88748feabb4cdedf1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into visiting harmful sites.

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://jottigo.ru/123?utm_term=units+of+measurement+word+whizzle+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403556/normal_60057a1565a68.pdfIn PDF document text
    • https://fukusegoboviv.weebly.com/uploads/1/3/1/8/131856281/ee193681dda30.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/1y6jhhc/business_boarding_up_ahead_of_election.pdfIn PDF document text
    • https://lokuzovitopoz.weebly.com/uploads/1/3/4/8/134871506/fenodedol-vazafe.pdfIn PDF document text
    • http://podorokufexapal.iblogger.org/82464359077.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408990/normal_5fc4318b1c9eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450426/normal_5ff76d2483a4b.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/341916.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/pjbsig6/pixel_swordfish_io_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/botuvawezej/f7U8FbC/60307607015.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jugikan.epizy.com/depths_of_malatar_guide_alcast.pdfIn PDF document text
    • http://gubodasitonobu.epizy.com/10993319950.pdfIn PDF document text
    • http://bamasagure.epizy.com/wotewatevuwenitarosak.pdfIn PDF document text
    • http://gusozafameximi.epizy.com/48250570867.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/fccla_power_of_one_project_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/90993563702.pdfIn PDF document text
    • http://fanurumuge.epizy.com/guliwolanazepolal.pdfIn PDF document text
    • http://vonolukover.epizy.com/chrome_export_certificate_pem_format.pdfIn PDF document text
    • http://jasukapikubov.rf.gd/kagivibubafazet.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_off0000d2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B0 5280 bytes
SHA-256: 0d6e3816747ee47768623da1c360bac92826c12c040c74d5e8e577dedce74c7f
font_01_sfnt_off0000e493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE493 10596 bytes
SHA-256: 3cd6f12ad51da7acf0d6af5666bc3a4462ffd2fe0ff1bcd1fe7ba957eca55956

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