Malicious PDF — malware analysis report

Static analysis result for SHA-256 d836c3c62e28f9bd…

MALICIOUS

PDF

78.4 KB Created: 2021-03-23 03:36:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e4a36066d49d75bf2af7f37d27855339 SHA-1: 39e56a3baad0c4dbe0bd65fb47d7e85d47c34276 SHA-256: d836c3c62e28f9bdea0d6a5b923c391d5585fb45d49ae967d5b0db7fc4fcda87
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'support gps garmin nuvi 55', suggesting a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/aws?utm_term=support+gps+garmin+nuvi+55 PDF link annotation
    • http://futajef.medianewsonline.com/balanced_scorecard_journal.pdfIn PDF document text
    • http://good-production11.site/36017939606o4mm2.pdfIn PDF document text
    • http://raxewapikeb.mygamesonline.org/concierto_de_aranjuez_brass.pdfIn PDF document text
    • http://vash-komfort5.ru/wananamobuvidoniio2z6.pdfIn PDF document text
    • http://nebo-baikala.ru/dometic_rooftop_rv_air_conditioner_repairnql5m.pdfIn PDF document text
    • http://getcabinets.xyz/510823880862qq49.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/weekly_schedule_template.pdfIn PDF document text
    • http://goodnaturak.space/airpods_2_features_on_android9mm4h.pdfIn PDF document text
    • http://tehnotop.space/62809463655scamc.pdfIn PDF document text
    • http://tricitysikhs.com/3346845980qf9dd.pdfIn PDF document text
    • http://copyrightmediahelp.com/how_to_write_a_play_script15zbu.pdfIn PDF document text
    • http://vugaganopofom.mypressonline.com/fufigekoxibexemurow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vasofirida/voltdb_performance_guide.pdfIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_9da773f1578b4f83aad5a11b1f6ba2cd.pdf?index=trueIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_e7f207cb36f54e3ea39027fa8f775bba.pdf?index=trueIn PDF document text
    • http://jaxejibowanub.rf.gd/ace_personal_trainer_exam.pdfIn PDF document text
    • http://kodupir.epizy.com/somadadapama.pdfIn PDF document text
    • https://2e21b658-2967-4279-8f18-a03590b678a5.filesusr.com/ugd/f5e1b2_5baadb6f71764db2b80bc74315c00db3.pdf?index=trueIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_753242ae263c462895fa57de69c2d9ff.pdf?index=trueIn PDF document text
    • http://rosajeku.myartsonline.com/nofuduv.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/canon_mp250_ink_cartridges_argos.pdfIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_598d17614a8146bf985d0e2c6c5c1959.pdf?index=trueIn PDF document text
    • http://vizulubafaxal.epizy.com/whatsapp_video_tik_tok_new.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_off0000f554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF554 5396 bytes
SHA-256: 7c06b7985bd286813b451be34665a0f03c494bd130d973b51d0ca340870efcc6
font_01_sfnt_off0001079f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 10692 bytes
SHA-256: 68a4645a428b250ec0bfb4eff86373902d51b689dcb76dd7625375b9726473c6

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