Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e46759915b6700…

MALICIOUS

PDF

113.8 KB Created: 2021-03-29 05:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 871406aaef700ab07ae070dc0dc87d07 SHA-1: 2894a76ca70a0ca4a100389054c6176352a564cf SHA-256: 89e46759915b670078a2cd97ba7a91a2dac48707df9523a1d2da3db14667c40d
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to 'http://sis-paypal.com/intellij_format_code_all_files7d4lz.pdf'. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a device manual, likely to trick users into visiting the linked malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dafemum.ru/award?keyword=alcatel+one+touch+pixi+7+manual+pdf
    • http://sis-paypal.com/intellij_format_code_all_files7d4lz.pdf
    • https://cdn-cms.f-static.net/uploads/4476126/normal_6024ed5734842.pdf
    • https://cdn-cms.f-static.net/uploads/4472501/normal_604e3a089b213.pdf
    • https://cdn-cms.f-static.net/uploads/4501360/normal_601f127a4e3a8.pdf
    • https://cdn-cms.f-static.net/uploads/4460048/normal_6036db7dbdd79.pdf
    • https://static.s123-cdn-static.com/uploads/4472185/normal_5fc6007317d4a.pdf
    • https://cdn-cms.f-static.net/uploads/4452161/normal_6032dee8bc3df.pdf
    • https://cdn-cms.f-static.net/uploads/4379241/normal_605b4377b189d.pdf
    • https://cdn-cms.f-static.net/uploads/4388052/normal_600c99692c7e6.pdf
    • https://static.s123-cdn-static.com/uploads/4483589/normal_5ffea010b35d2.pdf
    • https://cdn-cms.f-static.net/uploads/4408177/normal_6060ad43cebde.pdf
    • https://cdn-cms.f-static.net/uploads/4464877/normal_6043346b14b1e.pdf
    • https://cdn-cms.f-static.net/uploads/4454665/normal_600bced114e3f.pdf
    • https://static.s123-cdn-static.com/uploads/4374963/normal_6006de95d28d3.pdf
    • https://static.s123-cdn-static.com/uploads/4412165/normal_60065fb159482.pdf
    • http://contarinihome.com/geometry_special_right_triangles_worksheet_answerspfn5o.pdf
    • https://cdn-cms.f-static.net/uploads/4377098/normal_603421d399afd.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_d1d925e804c2419aa24dac189a3752fe.pdf?index=true
    • https://s3.amazonaws.com/garorowa/apspdcl._cgg._gov._in_hall_ticket.pdf
    • https://s3.amazonaws.com/luborinizu/57082074589.pdf
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_d05b8aeae6df40f09b7892d216eed50b.pdf?index=true
    • https://s3.amazonaws.com/rexogeguxosix/kindle_paperwhite_3_replace_battery.pdf
    • https://s3.amazonaws.com/fizufapu/trigonometric_equations_problems_with_solutions.pdf
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_9b992d60ef1c4eaf8a90902a6f23b685.pdf?index=true
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_7c6c567cb66a404fa8201a3c5b63c167.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://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_off00014ad2.bin
5f506f96885c68285abb08013964e969243e5a1cdb180af6bb27fe8127c8fd8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD2 3724 bytes
font_01_sfnt_off000157ff.bin
03b77f781b5ad93258f00ed75dd7e27b5be3e99dfa148cdd8c9fa3dd0a6522ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x157FF 2160 bytes
font_02_sfnt_off000161b5.bin
24ced9617e7e2f6fcd662969d30a5b3e3056e9eea3e889deb049a02c4d7d5911
pdf-font-stream PDF embedded font (sfnt) at offset 0x161B5 5260 bytes
font_03_sfnt_off00017386.bin
7e956a11a7609abea652018c2100228003038bd4b3e1a1e2ad639877a1787ddd
pdf-font-stream PDF embedded font (sfnt) at offset 0x17386 14876 bytes
font_04_sfnt_off0001a18b.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A18B 16204 bytes