Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98a1fd182e08a88…

MALICIOUS

PDF

83.0 KB Created: 2021-03-15 10:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 7a1c983cadbb1a3550471c53ace62782 SHA-1: 5af3838e0e1b990bfd948a6c1a5192b67686e14b SHA-256: e98a1fd182e08a889ec19b5c85789c9505440cca51f7654f2323b32c8bf57248
66 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, one of which is presented as a lure for downloading an 'apk'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to distribute unwanted or harmful content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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://lozipotod.ru/123?utm_term=holy+bible+niv+offline+apk PDF link annotation
    • https://ketezujozak.weebly.com/uploads/1/3/4/7/134744557/mewapasijizer.pdfIn PDF document text
    • http://tcerkovniekupola.space/manual_gps_garmin_oregon_6508185n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388060/normal_5fcb1516c107c.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/jvkjfgQ/super_wings_jett_run_hack_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_60266a9c8860a.pdfIn PDF document text
    • http://romeital.space/69039798154lknq.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/rovijifasowadab-zulogubofito.pdfIn PDF document text
    • https://mosejibufo.weebly.com/uploads/1/3/4/4/134437632/fululimividivononos.pdfIn PDF document text
    • https://kuxorife.weebly.com/uploads/1/3/5/3/135313812/zuvebogalevemibupa.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/muboleturisezin.pdfIn PDF document text
    • http://onesmall.space/the_art_of_taking_action_gregg_krechs8q8s.pdfIn PDF document text
    • https://risibazizugati.weebly.com/uploads/1/3/4/7/134710005/8608294.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvapolaxaj/ZijCghB/53849505510.pdfIn PDF document text
    • https://nojabepeteguki.weebly.com/uploads/1/3/4/6/134669956/bezesakipen_miwitaz_foxikegikalaza_winapajuwi.pdfIn PDF document text
    • https://bidefajiwi.weebly.com/uploads/1/3/4/0/134096082/wisobodoxew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457005/normal_601136cec3ff3.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/fjgwgdZ/cryptography_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bezofusipow/cheXidx/idle_zombie_defense_characters.pdfIn PDF document text
    • https://marizezibafive.weebly.com/uploads/1/3/4/8/134865590/golibiwojigupet-wazogax.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/htPtthb/fixegika.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://gagolabirej.atwebpages.com/50671976561.pdfIn PDF document text
    • http://nopugorib.onlinewebshop.net/what_do_you_do_when_your_keurig_wont_brew.pdfIn PDF document text
    • http://sizemogigu.myartsonline.com/what_is_the_compensation_for_being_on_judge_judy.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BF 4948 bytes
SHA-256: f135af213dbac95631bf344fe8392fc683c4cf769f257699a4d11168899fe3c1
font_01_sfnt_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 11728 bytes
SHA-256: dbcfd698d259e8beaaebf9f33f66a709db6cbe81eb3f86d30b4c916871078e88
font_02_sfnt_off00011b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B77 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_03_sfnt_off0001307a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307A 3340 bytes
SHA-256: cc928780195adc50cfeb2db01092ed3b08732fd5acb720c068856d20bbf30bc0