Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1c8e212ea3d63f…

MALICIOUS

PDF

91.7 KB Created: 2021-03-18 21:29:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0e7a61829717383ab1ef3cdade418db SHA-1: 2929d8bfdb10e3527429a33c041b5f24737d2f43 SHA-256: 9b1c8e212ea3d63fdf10abdda8f1fa55f90c8f3d5f0181eac8044072026c0941
156 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely part of a phishing or malware distribution scheme. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting an attempt to create a link farm or distribute malicious content. ClamAV detection as Pdf.Phishing.Trojan further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=acido+laurico+pdf
    • https://static.s123-cdn-static.com/uploads/4373526/normal_5fec6bae75a7e.pdf
    • https://static.s123-cdn-static.com/uploads/4412413/normal_5ff1d98662b82.pdf
    • https://cdn-cms.f-static.net/uploads/4448719/normal_6036d41b256e6.pdf
    • https://static.s123-cdn-static.com/uploads/4452389/normal_5fe1fe4306161.pdf
    • https://cdn-cms.f-static.net/uploads/4408706/normal_6046a20e6bc0a.pdf
    • https://static.s123-cdn-static.com/uploads/4388048/normal_5fce45b63dc6b.pdf
    • https://static.s123-cdn-static.com/uploads/4454429/normal_6004aa304f3cb.pdf
    • https://cdn-cms.f-static.net/uploads/4376357/normal_604bb60941200.pdf
    • https://static.s123-cdn-static.com/uploads/4377114/normal_5fe1fb4420043.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jewizopukuni/android_oreo_update_huawei_p9_lite.pdf
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_b10207cf5fdb47279e2682c19c6649fa.pdf?index=true
    • https://443275ec-395d-4f86-84c9-2ed7a250e117.filesusr.com/ugd/7d471d_515b0d02d21d4a1daf224b6e987c57d4.pdf?index=true
    • https://s3.amazonaws.com/potamotaz/kaossilator_pro_manual_espaol.pdf
    • https://s3.amazonaws.com/dutimajizowa/division_2_starter_guide_reddit.pdf
    • https://s3.amazonaws.com/xurixado/gikufiludoraketojez.pdf
    • https://s3.amazonaws.com/jesidofefe/what_does_a_broken_blood_vessel_in_my_eye_mean.pdf
    • https://s3.amazonaws.com/pivetuzadujo/game_bully_offline.pdf
    • https://s3.amazonaws.com/leteraxewe/advtech_limited_annual_report.pdf
    • https://s3.amazonaws.com/sinamozagemoger/24656281833.pdf
    • https://s3.amazonaws.com/godewumazek/51071821083.pdf
    • https://s3.amazonaws.com/tuxenipup/kudafamakem.pdf
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_f885679bbe8341f0bcf6b5f1c887fc61.pdf?index=true
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_d4f91c84eafc491b8805b04a1133db5e.pdf?index=true
    • https://s3.amazonaws.com/dakebesuvum/alcatel_one_touch_retro_flip_phone_sprint.pdf
    • https://1e2e1d2f-e5bc-406e-8ade-c93a3c5db6fe.filesusr.com/ugd/81c7be_1c4e428466004f9e8e19791ddc627566.pdf?index=true
    • https://s3.amazonaws.com/xakusineba/40029750041.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001026a.bin
d6e65adb247990ee49fc899814f2b7a5432a855005627b769a202ec9b16dfdf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 4536 bytes
font_01_sfnt_off000111d7.bin
8a3020eff48f872aa017efd68c6ae4f10b50e82fa19daf43fd8ffb2e2acce425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111D7 13196 bytes
font_02_sfnt_off00013c09.bin
d25a34a56be33791b66bd7dbe91ee772b39b89bee75ba0e64ef3ea6cb2c10b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C09 16260 bytes
font_03_sfnt_off0001517f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1517F 4324 bytes

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