Malicious PDF — malware analysis report

Static analysis result for SHA-256 d314ef6b6571716d…

MALICIOUS

PDF

83.3 KB Created: 2021-03-24 00:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bcdd1b184d39744d5c8700cfe7cf4374 SHA-1: dd08a4556fdd84ca7570e891478577aa8677a278 SHA-256: d314ef6b6571716deeadf328044761535f421bab1cee1d5ef41fb8f8120d333c
186 Risk Score

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. 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 0.9994

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/wix?keyword=2013+social+studies+staar+test+answers PDF link annotation
    • https://cdn.sqhk.co/suxujaba/Bjjghji/mp3_player_download_app.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/4hhKCeq/35897534481.pdfIn PDF document text
    • http://prod-fruit.space/word_calm_answers_108gnitf.pdfIn PDF document text
    • https://xofebigile.weebly.com/uploads/1/3/0/7/130739964/3472480.pdfIn PDF document text
    • http://gradstroy.su/14141969366m3sid.pdfIn PDF document text
    • https://cdn.sqhk.co/metajewamiva/Ytjaico/transformers_prime_shattered_glass_megatron_fanfiction.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/jgjegcO/gopokurubur.pdfIn PDF document text
    • http://urott-hu.com/49506784829jj5cd.pdfIn PDF document text
    • https://kogekotosejikol.weebly.com/uploads/1/3/5/4/135400664/mofudamuduzipemozop.pdfIn PDF document text
    • http://lebojabufi.medianewsonline.com/solid_waste_disposal_management.pdfIn PDF document text
    • https://rigefenasoje.weebly.com/uploads/1/3/0/7/130776330/5e01fec72ab34.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/65461985069.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/how_to_connect_bluetooth_bose_earbuds.pdfIn PDF document text
    • http://pavozuketogo.mygamesonline.org/sbi_personal_loan_form_file_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/Ahhdhgi/balosawomota.pdfIn PDF document text
    • https://bexenexitefixu.weebly.com/uploads/1/3/4/7/134725849/bodebe.pdfIn PDF document text
    • https://pizazolumugi.weebly.com/uploads/1/3/4/0/134016987/fojenul_vudakenerebofe_nevaxawupufab_xizaw.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/cMgdhfY/70106141178.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/mhaZkhb/combat_flight_simulator_2_wwii_pacific_theater.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/xevatoti3e8t5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_308ab6dac5c94865b8387a3f29acfbf1.pdf?index=trueIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/45834650668.pdfIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_70b082639a9a4df8b03dfe94a6db583d.pdf?index=trueIn 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_off0001069d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069D 5420 bytes
SHA-256: d25886f50c1dc9693bb229962a50e08f525a3d68f4b617deee86c5135e9ef028
font_01_sfnt_off00011925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11925 11344 bytes
SHA-256: 6ffbb5af4d4ea627a3c708fc2a3007c30170943dfc4c4ff330fd3ef277eed874

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