Malicious PDF — malware analysis report

Static analysis result for SHA-256 072f17e99f987193…

MALICIOUS

PDF

96.3 KB Created: 2021-07-02 08:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 849be3750ea8a5f681aed014dd72d493 SHA-1: 0b7b1dc7fdacc3cfcf3fb2ca1fdf0f623df67feb SHA-256: 072f17e99f98719332f1a85f60815d77cbca8cdd47b73b6ecac1546a3469053e
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or credential harvesting attempt. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content likely prompts users for sensitive recovery secrets or private keys. Numerous external URLs are embedded, suggesting a potential redirection to malicious sites or the download of further payloads. No scripts were extracted, but the presence of multiple external links and the nature of the lure point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=fermat%27s+little+theorem+in+cryptography PDF link annotation
    • https://agrilaui.com/userfiles/file/72632351859.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/negujakugoti.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/se8dneifbpo2c4qpuli7e6aor2/75232210201.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/62240439111.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d8abd9262---topixejaborakimazipigeben.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/vufotunuvipupeteko.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4894fc432e---zejigejijolug.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/214ea782ed10ec1e3937a48713d3f2b9/28546690056.pdfIn PDF document text
    • https://angkagenap.com/contents//files/57008048075.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982469652b1---wazazoxitufadeferus.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160948e6bd8f48---72214414736.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947f82bd753---88322738479.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/60471efc4ad17cdf1d889dd5ddab3170/lizalevunejiroviwajiruk.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc24d10e99---jujabavegokexajan.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/a5bah85p8kjo69hvddi9rnbk5r/pasedomusi.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/5afcf18e421fcae7dbe2062554434c7c/mogaxit.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/86879671086.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/bqadt66q3eltrl82dqpvf72av0/29471705236.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/345a6efa7935301a29461faed06bc6ef/66033571802.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/69797742220.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/9287509c7a29dcdb7aa796b6cb4a5609/xifuxoze.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/zedudopemuxubofirorugoz.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 19960 bytes
SHA-256: 3bdf0d961a45414ec93e80cfc4fff82c3c895ca3940e59e736a0589cfad209bb
font_01_sfnt_off00012ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE7 16128 bytes
SHA-256: bfffaa37a5602b6eff5246b20cbad2384b754602d7d4442f8ad6d6889a1b717b
font_02_sfnt_off00014051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14051 10944 bytes
SHA-256: bd66c885838cd05847d0513d5b9742d02bc7752e169171a8ce5d5eda1e62ad31
font_03_sfnt_off00015990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15990 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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