Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b8b11d2360385a…

MALICIOUS

PDF

76.0 KB Created: 2021-03-15 20:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fd628f8551820a13047a34fe9a05e82 SHA-1: 6f849af41d28eba050731de174a22f547dd0ecdd SHA-256: e0b8b11d2360385a64acc0e14ee5062f728f54442a3118be94650d586055153e
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs suggest an attempt to redirect the user to malicious websites, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://jumiwimov.ru/123?utm_term=doxology+sheet+music
    • https://cdn.sqhk.co/nuvaratuji/WwPjaji/smash_hit_mod_apk_hack_download.pdf
    • https://cdn.sqhk.co/jidulopavoji/nhgeggf/shipping_manager_jobs_in_canada.pdf
    • https://cdn.sqhk.co/tojebaru/jfHlzif/84098823033.pdf
    • https://lumigoxodavi.weebly.com/uploads/1/3/1/6/131606620/f4232ff0d02b.pdf
    • https://wisenuru.weebly.com/uploads/1/3/1/8/131856959/7440826.pdf
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/8c2c7d4aa27315.pdf
    • https://cdn.sqhk.co/gojikanemiju/jeiaics/liravukinabovilur.pdf
    • https://vadopesi.weebly.com/uploads/1/3/0/7/130738994/eb33054ba7c6bd8.pdf
    • https://napuraviseso.weebly.com/uploads/1/3/4/3/134322211/8f4ccaf64e257b5.pdf
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/doditugo.pdf
    • http://jofufunobek.sportsontheweb.net/880069099.pdf
    • https://nebilewanowuz.weebly.com/uploads/1/3/6/0/136083660/kuwudefutapukafum.pdf
    • https://bixavovene.weebly.com/uploads/1/3/0/7/130775743/mavumuzaresak.pdf
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/9309152.pdf
    • https://vufufibujirefe.weebly.com/uploads/1/3/4/3/134355905/60a3d9c66043c27.pdf
    • https://cdn.sqhk.co/gufojakig/gghfq5C/infamous_second_son_paper_trail.pdf
    • https://vopenunajobip.weebly.com/uploads/1/3/2/3/132302870/zofef_zoluvenuv.pdf
    • https://tesevazaxuj.weebly.com/uploads/1/3/4/4/134476418/todisununelowujurere.pdf
    • http://rubewox.sportsontheweb.net/can_i_use_my_oven_like_an_air_fryer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d5ccf9f5-39dc-478e-a8f5-9c53430f3055/how_much_does_it_cost_to_replace_ipod_touch_screen.pdf
    • https://uploads.strikinglycdn.com/files/3d97b0e4-adc3-4c22-bb81-5380d66e23e4/lenagogipuvijurugevexe.pdf
    • https://uploads.strikinglycdn.com/files/74bc0d51-3bc3-489e-9d5c-62a3e2299ad9/dehumidifier_not_collecting_water_uk.pdf
    • http://kaxuwenewutexu.myartsonline.com/zimuwalexapogevaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed57.bin
871ca56c6656692a3dc0e8601b6fbec4de74fb0c167966e67bb24ab9e636e501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED57 5076 bytes
font_01_sfnt_off0000fe96.bin
ac814267cd3ba121fae6f7e2da6a38cfda302abe22a501e6b8d6efff16a899b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 10564 bytes

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