Malicious PDF — malware analysis report

Static analysis result for SHA-256 d141da2284aed153…

MALICIOUS

PDF

89.1 KB Created: 2021-04-07 18:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3c57cc3cd5dda0ec162195b186d73297 SHA-1: 306f179bf27d68b8b1d37c48dadefed65b486c77 SHA-256: d141da2284aed153657a79101e7036892ed1c8de4c19d62f1bd9093a0966330d
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 0.9997

Heuristics 5

  • 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.
  • 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://bologen.ru/wix?keyword=1987+j+weston+walch+publisher+worksheets+answers PDF link annotation
    • https://cdn.sqhk.co/kokuxisa/0ifigjb/vagezidupazavoporirato.pdfIn PDF document text
    • https://rinadulig.weebly.com/uploads/1/3/0/7/130739308/bojozi.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/heifCih/motodeguvojosimutuwaniti.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/z6cE0ic/77364802105.pdfIn PDF document text
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/9694754.pdfIn PDF document text
    • http://bezivodediz.iblogger.org/44716681130.pdfIn PDF document text
    • https://jidobatixinel.weebly.com/uploads/1/3/4/7/134726111/jufewuw-ramonisidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411702/normal_603d518ece847.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/5996719.pdfIn PDF document text
    • http://folivapizi.66ghz.com/mifepetovobogifage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485172/normal_5fcbe25449eab.pdfIn PDF document text
    • https://folumenudi.weebly.com/uploads/1/3/2/6/132681426/sojiwux-senire-xojokiperuwufi-pawalidaxaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ravitog.rf.gd/kesedizesiwijad.pdfIn PDF document text
    • http://tagejenetel.rf.gd/koxotasosogenozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ed772c-51d6-4609-9a92-557717cc19de/gurobopirifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ec2ce5-ecfc-45d9-ae95-25d863b09e5c/3269403294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c9c0c4-ea96-4d69-8c81-e0aa153c2211/how_to_disassemble_shark_navigator_lift_away.pdfIn PDF document text
    • http://rirusivinudi.rf.gd/44007344663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04517974-9868-45e4-89e6-9d2dde3c2a7a/7354974574.pdfIn PDF document text
    • http://ligirewela.epizy.com/25183637852.pdfIn PDF document text
    • http://radodazemiluk.epizy.com/rotexule.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_off00011d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D31 5780 bytes
SHA-256: c6e540a79f95f97dd0e55b0c3f72f94940b4d1120c3cdc74eedc2543f68205e9
font_01_sfnt_off000130f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F2 11224 bytes
SHA-256: 6d09cfabe9eb132417a219c35ce23dd74dbdc261ed5277ab94d6d7a07b5b8006

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