Malicious PDF — malware analysis report

Static analysis result for SHA-256 5180ae28840adde1…

MALICIOUS

PDF

79.0 KB Created: 2021-03-30 15:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4b29f333838a3caa44a0d24c92f9bb9f SHA-1: 12fe66a690680bb59df4a3ad22eaeb82cb5775e9 SHA-256: 5180ae28840adde1b0ec4a51e68f1b5c1432f4e68e7939f47fd96ddaa8aefaba
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, characteristic of a link farm designed to distribute traffic to various malicious or phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's used to lure users to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/strik?utm_term=g+shock+g+7900+price+philippines PDF link annotation
    • http://roman-holidays.shop/big_little_lies_book_review709dn.pdfIn PDF document text
    • http://testersairf.xyz/mijamiwexezofevifezo1c6vh.pdfIn PDF document text
    • http://center-san.ru/how_to_calculate_days_until_due_date_in_excelii5z2.pdfIn PDF document text
    • http://interior.estate/stock_markets_today_tsxkaax4.pdfIn PDF document text
    • http://my-favshopf.online/what_is_a_assistant_office_manager_job_descriptionpfz8t.pdfIn PDF document text
    • http://mrshadow.net/bixazeleruwerapulazumousdql.pdfIn PDF document text
    • http://findattime.com/proform_power_995i_treadmill_best_buy4xdi4.pdfIn PDF document text
    • http://trokot-tonirovka.online/vifuduzuvedotodajibinupuplrfor.pdfIn PDF document text
    • http://busurman.space/97559507654q53kd.pdfIn PDF document text
    • http://mediaverifiedbadge.com/native_american_zodiac_signs_and_their_meaningck2db.pdfIn PDF document text
    • http://br1.red/9155538457z14ot.pdfIn PDF document text
    • http://itash.space/bcps_study_guidecg62w.pdfIn PDF document text
    • http://chambrehub.xyz/do_fedex_have_notary7x4e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_15ab2eae656f49bd801f796d58ccbdfd.pdf?index=trueIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_671ad052b8814af0b2a63a9230891a81.pdf?index=trueIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_18de56e77bb24f7d8039a3ae351e3703.pdf?index=trueIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_a082bff406834021bfd099a35162b6f4.pdf?index=trueIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_3c5293f2278844ad90ca9785c574ed88.pdf?index=trueIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_f39d56b95f1c4a9b9be4168250e46d43.pdf?index=trueIn PDF document text
    • https://c4fca8c4-0f54-45c3-ae88-320069d86c16.filesusr.com/ugd/ac0d21_5514db839abc47ddb265b87c3f51edb4.pdf?index=trueIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_d9bbe1586bd546c69561d46ba2fe55ce.pdf?index=trueIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_a94a77a998a743cab81ffe2680770ac3.pdf?index=trueIn PDF document text
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_5de1473ae2014ca69d1e1058e4762e0b.pdf?index=trueIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_f46418149b87492d8c9daa873f6049e3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 2880 bytes
SHA-256: b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167
font_01_sfnt_off0000f4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A8 5456 bytes
SHA-256: 3bf00eab3cfc159ace5b6132e8cc13858b7a2ab419665528177e1f3d1477037e
font_02_sfnt_off00010744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10744 11424 bytes
SHA-256: 908f472085ea7090049a9ed7ff1e3bc85c511a964b03d6c7d9de5225d199ba7b

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