Malicious PDF — malware analysis report

Static analysis result for SHA-256 e253d327b3050536…

MALICIOUS

PDF

83.6 KB Created: 2021-03-06 21:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abf04becd41d33b01110e285d14f4ded SHA-1: 7efe558eca5afc1b1b7639a46675e6a9a85f9096 SHA-256: e253d327b30505365f21dbfef94f76c6ba0dc7debdb74a03b216a01e5c7533d7
164 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a ML classifier indicated a high probability of maliciousness. It contains numerous external links, with one specifically pointing to a keyword-laden URL suggesting a phishing or malware distribution lure. The presence of a 'download button' heuristic further supports a deceptive download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/wix?keyword=igo+apk+cracked+2019
    • https://subokolabipu.weebly.com/uploads/1/3/2/3/132303028/8728980.pdf
    • https://cdn.sqhk.co/xotosira/Yja9EQ1/41598704494.pdf
    • https://cdn.sqhk.co/tixunudixa/dXjagip/50562896050.pdf
    • https://cdn.sqhk.co/lexijunibul/ciiw0if/texodetetenefopivekevove.pdf
    • https://cdn.sqhk.co/lebogomatoze/ghBuPJB/whisper_of_the_heart_cat_name.pdf
    • https://zuwuwuxi.weebly.com/uploads/1/3/4/8/134883554/fusinugopake.pdf
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/1960275.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/padosumifubobo/samsung_fast_charge_battery_pack_manual.pdf
    • https://s3.amazonaws.com/jiwisi/free_card_games_online_no_required.pdf
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_115e79ae6e104c9682b2500ea21448b7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b54ca065-4a09-4e96-9042-58ef5f24cd08/bavinejepopatet.pdf
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_e3e9d925bba749f0832933f10af8a6a2.pdf?index=true
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_9ab84af814ee4843a40322904f0fa553.pdf?index=true
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_9f8049d10eb44d16b800535dbafc5cff.pdf?index=true
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_10509f1953be441192db78de76389e05.pdf?index=true
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_84827a27b62d4fdfa7f06173318b02e5.pdf?index=true
    • https://680e7e7f-99bb-4309-8a01-ecc910dc7690.filesusr.com/ugd/717a42_1748f8910d784863845c7af80001d5c1.pdf?index=true
    • https://s3.amazonaws.com/dutuzanob/maze_runner_scorch_trials_audiobook_free.pdf
    • https://uploads.strikinglycdn.com/files/8657c1db-8e09-48dd-a15e-cc6fd5626a02/mental_toughness_meaning_in_urdu.pdf
    • https://s3.amazonaws.com/dazuxujepov/mofesu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4e2.bin
fb2630334e2defb88546039e0c9bbbe2b39b1b365614775b3269ebcf3219e872		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 5512 bytes
font_01_sfnt_off000107b7.bin
dd4b17c5bc7739c2dd89321662040ee3dc538917426c87c6b7ce6fb03437e161		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107B7 10376 bytes
font_02_sfnt_off00012b7f.bin
028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7F 16312 bytes

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