Malicious PDF — malware analysis report

Static analysis result for SHA-256 6181797b23b38dd1…

MALICIOUS

PDF

175.2 KB Created: 2021-03-15 20:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3058b0eb1412e6acce787786a96bdab5 SHA-1: 4dc0f4998ee536ab73e2a8e338da428d77c34314 SHA-256: 6181797b23b38dd1db8a1477ae6319f337078f050a8f32d06b843e59fd481a46
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that, when visited, appears to be a search result for a book's solutions manual. This is a common lure for phishing or malware delivery. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wb?keyword=computer%20systems%20a%20programmer
    • http://womizepivilora.sportsontheweb.net/tuliranixorapafapusuz.pdf
    • https://vakilonote.weebly.com/uploads/1/3/1/3/131382032/4663890.pdf
    • http://nejozewowedona.22web.org/31967052270.pdf
    • https://ragojozuzaz.weebly.com/uploads/1/3/4/6/134668900/0c8383.pdf
    • https://vijativu.weebly.com/uploads/1/3/4/5/134597759/latutajeme.pdf
    • http://moluroniv.22web.org/colbert_report_best_moments.pdf
    • http://rawoferifexa.22web.org/honeywell_rpls730b1000_u_7-day_programmable_light_switch_timer_directions.pdf
    • http://nawilojobate.iblogger.org/fewivutumefe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/legipalofi/keboxukudewesu.pdf
    • https://s3.amazonaws.com/timeziso/behringer_xenyx_qx1202usb_manual.pdf
    • https://s3.amazonaws.com/legipalofi/spectacle_visual_culture_definition.pdf
    • http://muwodedera.epizy.com/1577028648.pdf
    • https://s3.amazonaws.com/kotenu/the_road_cormac_mccarthy_literary_devices.pdf
    • http://tusejuw.epizy.com/88829444057.pdf
    • http://rekadifaleroj.rf.gd/fetatom.pdf
    • https://s3.amazonaws.com/gowupuzokowuxes/10450051658.pdf
    • http://jupegojut.atwebpages.com/56582809023.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_off00024bc7.bin
8abebcfa87aab980533bb2b58f840696128b679e7cb9a878957e04ad107c4a75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24BC7 5588 bytes
font_01_sfnt_off00025eb4.bin
40a0912f0a309dd5e40bc1b208142c9f30de150cd617cb39743e7c3ff838e460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25EB4 12728 bytes
font_02_sfnt_off00028a79.bin
fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28A79 16144 bytes
font_03_sfnt_off00029f74.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29F74 4324 bytes

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