Malicious PDF — malware analysis report

Static analysis result for SHA-256 3733bfffab3a3f4a…

MALICIOUS

PDF

80.6 KB Created: 2021-03-19 20:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cea69d0b07f2cfa65f0c93dcd29d2762 SHA-1: 9d8c5ee48da6b3f266953a84b44437a6d7383837 SHA-256: 3733bfffab3a3f4a5fa02173e38d331d93b6a2275b737087db2d1dfc17b3109c
126 Risk Score

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 0.9995

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://soxebez.ru/strik?utm_term=samsung+hw-j450+power+supply PDF link annotation
    • http://filuxunokenobud.mygamesonline.org/8302865947.pdfIn PDF document text
    • https://zatugole.weebly.com/uploads/1/3/1/8/131856706/bewegudonilazi-wegodumukub-fesikapug.pdfIn PDF document text
    • http://jomekiziwe.22web.org/netgear_ac1600_modem_router.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/barkley_fnp_review_book.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/jobs_in_us_army_base_in_germany.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/8hhiiBE/roruxa.pdfIn PDF document text
    • https://dosoludu.weebly.com/uploads/1/3/0/8/130814101/ab62a9ed03209.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/wisujujavililelonil.pdfIn PDF document text
    • http://vejuwetuk.mypressonline.com/winokamujudiwajupajegemil.pdfIn PDF document text
    • http://xekinivafu.iblogger.org/what_is_light_relief_meaning_in_hindi.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/Loz4Jjj/vepowotuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tagijonegularol.myartsonline.com/can_you_roast_potatoes_in_a_pressure_cooker.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/49638189021.pdfIn PDF document text
    • http://radepurot.epizy.com/bebobuzapo.pdfIn PDF document text
    • http://mafonevaverazux.atwebpages.com/vilomisasuv.pdfIn PDF document text
    • http://tetiduba.rf.gd/86701763779.pdfIn PDF document text
    • http://zojowaxe.epizy.com/the_magic_school_bus_books_age_group.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/kofevifajawumekezofa.pdfIn PDF document text
    • http://vekoxoke.epizy.com/atul_purohit_garba_mp4.pdfIn PDF document text
    • http://badokelo.rf.gd/how_to_connect_canon_imagerunner_2520_to_wifi.pdfIn PDF document text
    • http://pidezesu.rf.gd/kidde_smoke_alarm_model_1276_manual.pdfIn PDF document text
    • http://fenolelogokaxip.rf.gd/ordinal_numbers_1-_100_esl.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE501 5992 bytes
SHA-256: c3b73519169ec73d1ff0105aa6f27fd7ff07c9910b121de4bdd6de4fe841c48e
font_01_sfnt_off0000f965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF965 11172 bytes
SHA-256: f0f935d208e581087fa8d7449d5712d9705e71b4ef1f58faba7bff4ca2eb6fcb
font_02_sfnt_off00011fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD5 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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