Malicious PDF — malware analysis report

Static analysis result for SHA-256 643a85ccdb9c742a…

MALICIOUS

PDF

79.2 KB Created: 2021-03-10 03:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6135a75a83688475f4723ab454431ac SHA-1: a26d913fa2292de886ea676cde06667deeb9734f SHA-256: 643a85ccdb9c742a82640954ad35e3c0ca3d239e473c4bd56b2fc4e4a14558c1
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 related to financial topics like 'triangular arbitrage formula'. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The presence of embedded URLs and the link farm heuristic suggest a phishing or scam campaign designed to direct users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-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://botokaw.ru/wix?keyword=triangular+arbitrage+formula
    • https://cdn-cms.f-static.net/uploads/4387918/normal_5fd7dc5174ce9.pdf
    • https://pivuwolugere.weebly.com/uploads/1/3/4/0/134041199/fomikupuwut-mutikigonidi.pdf
    • https://jibunomo.weebly.com/uploads/1/3/5/3/135348462/fitepil.pdf
    • http://vilopeg.xyz/sas_ods_example_exceluh9dx.pdf
    • http://idealslim-italiaoficial.site/xojomolidatefo3cqon.pdf
    • http://antonioit.space/how_much_money_do_storyboard_artists_makekc6j0.pdf
    • https://static.s123-cdn-static.com/uploads/4384325/normal_5fc62e9ae786a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_f1360f15f8084069a2644b137c946fe5.pdf?index=true
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_c7ece54ce7444b428fd6dcb43f35310b.pdf?index=true
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_e34da47b5279452aa8d068b0966b1789.pdf?index=true
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_c695901bfad6400984d4016648b33e89.pdf?index=true
    • https://s3.amazonaws.com/xabalaru/stage_1_hypertension_guidelines.pdf
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_9dc02203437644538e1836fadbb3066f.pdf?index=true
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_f8dfa7b74ded49a690b21a860976109e.pdf?index=true
    • https://s3.amazonaws.com/taguxif/unscripted_posing_guide_app.pdf
    • https://s3.amazonaws.com/wobuzisibal/nsw_police_beep_test.pdf
    • https://s3.amazonaws.com/davubewu/97442997053.pdf
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_a0f388de74a6491a85d6bcf4500fd00d.pdf?index=true
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_c05f5cc757a24e0b8d8e737a5a6eb7ce.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb3d.bin
895a18d69de8bedf50ddf55eab653ebdb9626a3074ede607364d40be4c4b3d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 4880 bytes
font_01_sfnt_off0000fbbe.bin
0f6b1ade6da8d104670096468de310df2c303b44b37e6cf7813e60d27f26c356		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBE 10996 bytes
font_02_sfnt_off00012155.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12155 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.