Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9bbba3dd867a90…

MALICIOUS

PDF

78.8 KB Created: 2021-05-02 17:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 22cfef226ec3e4f8d2ab6f5330bf46d9 SHA-1: 5b20870b0dc9014afea5ceddd63277e5e48cdb9f SHA-256: 7e9bbba3dd867a906949f38d0cc2c7df20aee101c1b8028a3a8e90040813806c
156 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 0.9995

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 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.
  • 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://zajinet.ru/strik?utm_term=feng+shui+2021+predictions+for+sheep PDF link annotation
    • http://tajuliwelofiti.medianewsonline.com/ophthalmology_abbreviations.pdfIn PDF document text
    • https://cdn.sqhk.co/nudizodi/KDgfFhj/63321540250.pdfIn PDF document text
    • http://rosolab.scienceontheweb.net/java_8_api_documentation_download.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/is_there_a_sandman_2_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/pjmggdJ/64110834577.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/depakuwopizivalolumeru.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/hjjaVyG/loco_run_train_arcade_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/2geiaif/bike_race_free_mod_apk_7._7._22.pdfIn PDF document text
    • https://cdn.sqhk.co/genopigup/ixshhXq/adare_pujaniyai_shihan_lanthra_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/jajofatimukaselafele.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/mexican_invitations_free_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/auxiliary_transformer_manufacturers.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/snapper_walk_behind_mower_prices.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/8609091181.pdfIn PDF document text
    • https://7737876a-f762-42ef-af6f-18b78abacabf.filesusr.com/ugd/9066bd_58cc2b1e9ed94030ac4b729ef32c704b.pdf?index=trueIn PDF document text
    • http://sopavame.onlinewebshop.net/pelanedifomajure.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/gutifetogakezo.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/fijusunudev.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/hp_network_automation_api_reference_guide.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_f2d17bd8317a4b5b88c9ea6f975c049c.pdf?index=trueIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_0ac491c3d02249cca668517af36116af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/90826397081.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 5340 bytes
SHA-256: 71c5494cc3156d72c7236daaf68bc1f85ec3520fdea11451baef575a3a5a2f28
font_01_sfnt_off0000fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 11012 bytes
SHA-256: 6b8f5463aa89c7edf00cfbf22fa688a32200f86480398b0e3fbef2aa87e1fed0
font_02_sfnt_off00011fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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