Malicious PDF — malware analysis report

Static analysis result for SHA-256 0061804c3f07f7dd…

MALICIOUS

PDF

71.6 KB Created: 2021-04-03 01:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 06df94799c5688354d95141b2d47e8fd SHA-1: 5a1bc82cae8919cface97cca1af837a170150c57 SHA-256: 0061804c3f07f7dde83d15f5e61559f4e9093e6922c907ae0c93e80e9f59671f
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 0.9991

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://dugedepap.ru/award?keyword=coordinate+geometry+worksheets+with+solutions+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476270/normal_6055e1a414607.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/whaQlgd/hacker_simulator_tycoon_apk.pdfIn PDF document text
    • http://suwefazimim.medianewsonline.com/15448678742.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/geidibV/fawoxasemax.pdfIn PDF document text
    • https://suzexefovewav.weebly.com/uploads/1/3/4/6/134640410/bc0af93b5.pdfIn PDF document text
    • http://kigenavozos.iblogger.org/cuanto_es_4_1_2_pulgadas_en_centimetro.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/co1AYYb/91629949878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453721/normal_602c8e9e577dc.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/gfykjiV/zalokavavipexopiveg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458150/normal_60677e5b2c782.pdfIn PDF document text
    • https://varepanuror.weebly.com/uploads/1/3/5/3/135394497/5129603.pdfIn PDF document text
    • https://cdn.sqhk.co/tezakagadol/gigifif/viganiva.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/vomidipufoje.pdfIn PDF document text
    • https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/7205676.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/lulabetama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_601a9be99273b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nujorowej.epizy.com/93736751220.pdfIn PDF document text
    • http://dikiboxexoginag.epizy.com/43461727167.pdfIn PDF document text
    • http://sazizonega.rf.gd/john_deere_60_mower_deck_belt_diagram.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_6a646bc3227b424197f91681b43de33b.pdf?index=trueIn PDF document text
    • https://62bfe9e3-d01a-456c-9d14-3ac71290fd99.filesusr.com/ugd/cfe640_a076f775a80543ef9d4ee7eb6441e3ae.pdf?index=trueIn PDF document text
    • http://gajopule.myartsonline.com/megit.pdfIn PDF document text
    • https://562a32fb-e9c8-4d8f-ac7e-a760da58c396.filesusr.com/ugd/68ec97_0daec8bc30b144eb98696ec2a14dc5fe.pdf?index=trueIn PDF document text
    • http://pizenusogusu.atwebpages.com/muscle_gain_diet_plan.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_off0000d835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD835 5620 bytes
SHA-256: e1576bee5f61802542598a13a84a1af2901644b39c6a3f8c001c42390c1d1932
font_01_sfnt_off0000eb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 10928 bytes
SHA-256: fd1769044c5c4a22548dcba148a76c8a0c2e6678ff379b76ddb151982124f519

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