Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f32ad55b6f451d…

MALICIOUS

PDF

101.4 KB Created: 2021-04-01 18:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d76058c26ee0afa04cb71785ea8dd2e9 SHA-1: 310836d16e5f889c9891bd56584de3c4d5f50f86 SHA-256: a3f32ad55b6f451ded2aaef526da1382d4cbf387333eb50d69ba8578a81ff230
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious websites. The presence of a critical ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent. The embedded URL 'https://lozipotod.ru/wix?keyword=hogwarts+mystery+mod+apk+platinmods' suggests a lure for users seeking modified application downloads, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/wix?keyword=hogwarts+mystery+mod+apk+platinmods
    • https://sudefenumub.weebly.com/uploads/1/3/5/9/135984534/1047400.pdf
    • http://grusha.space/bufulamojamig3tfp5.pdf
    • http://loveantravel.xyz/muxebuganayu9p6.pdf
    • https://cdn-cms.f-static.net/uploads/4495550/normal_5fe9c78f22a59.pdf
    • http://asta-stroy.ru/golf_buddy_laser_1s_w_slope_rangefinder_pin_finder_vibrationdfdxl.pdf
    • https://cdn-cms.f-static.net/uploads/4471085/normal_5fda1a0ba310b.pdf
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/supizaximibit-rakunoturum-punolo-zogabapu.pdf
    • http://wumorumomu.22web.org/9003323981.pdf
    • http://vodoroding.info/wunizifotonqdz.pdf
    • https://zugudomumomaxix.weebly.com/uploads/1/3/5/3/135324912/7419588.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://wekijedi.epizy.com/41862653191.pdf
    • http://muxobuduxude.epizy.com/gallbladder_stone_diet.pdf
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_40b8eb57029344fb960027443f84b5d4.pdf?index=true
    • http://xafewor.rf.gd/parakeet_care_sheet.pdf
    • https://63150c49-9e7f-4923-bc7a-1e4049050ce6.filesusr.com/ugd/cba449_8f86f86ff5204d8b92985835b5a52ed1.pdf?index=true
    • http://kuvevaxumo.rf.gd/wosazatuweki.pdf
    • http://nenoruzu.rf.gd/burger_king_coupons_2020_mrz.pdf
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_3a86e29fb9104eefa66ac1103aaeba68.pdf?index=true
    • 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://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001114b.bin
4fcf8082ff98205cfb6b2a42338248b2495824dfcfa5d5032e9a0e4245033601		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1114B 5496 bytes
font_01_sfnt_off000123fa.bin
8e3de72f7fbb40ff62ef041ffbb89011ce66453b04e999d963f637f35e6ae6db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123FA 3600 bytes
font_02_sfnt_off0001326a.bin
575a18efd1e86fb7565a5dcab2cefa00aae1d84620102c55e2090b136cab6fea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1326A 6116 bytes
font_03_sfnt_off00014243.bin
d4f8a693276a41f3ae3b33e4e5f586ac75144be603d5e1c128b4ea1623269674		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14243 16216 bytes
font_04_sfnt_off00017070.bin
c624d7b7b1c3e0f3fe97ba9fc7410f2ead0d51ceb2468d62cca6b71c1314a207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17070 16184 bytes

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