Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f930c38ca3cb8b7…

MALICIOUS

PDF

61.5 KB Created: 2020-10-01 23:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 11a0d62edf1168ec61aa687495ec8ed6 SHA-1: a713b6726645ba7914c04507ff496142a9842896 SHA-256: 5f930c38ca3cb8b75bb84ba2702bdde77af024d8fb978fe4f31c02f98113862b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm. One of these links, https://ggtraff.ru/strik?keyword=george+killing+lennie+quotes, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The presence of numerous external links and a malicious redirector strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=george+killing+lennie+quotes In PDF document text
    • http://files.argonaftesyouthclub.com/uploads/1/3/1/3/131398185/luxonidezesogomesari.pdfIn PDF document text
    • http://wosib.cannihempco.com/uploads/1/3/1/1/131164504/jebakidanesot_ledivololumaket_popagoz.pdfIn PDF document text
    • http://bubezo.nikpatellife.com/uploads/1/3/2/6/132681352/pubefujotu.pdfIn PDF document text
    • http://files.inventors4hire.com/uploads/1/3/1/4/131438113/xipejejugojewabovagu.pdfIn PDF document text
    • http://fimot.thefoodguidetofitness.com/uploads/1/3/1/4/131452860/6979623.pdfIn PDF document text
    • http://files.gelardivineyard.com/uploads/1/3/1/4/131408465/1b435.pdfIn PDF document text
    • http://files.bart-en-marleen-in-frankrijk.com/uploads/1/3/0/7/130740265/4354242.pdfIn PDF document text
    • http://mobiparis.sarickmatzen.com/uploads/1/3/1/4/131407406/rewov.pdfIn PDF document text
    • http://files.katewestart.com/uploads/1/3/0/7/130775402/9248079.pdfIn PDF document text
    • http://files.diazrioslab.com/uploads/1/3/1/1/131163780/tokobajewalirisu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9485/4811/files/raid_shadow_legends_characters_to_keep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1863/5422/files/bose_sounddock_10_remote_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/business_communication_10th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/10805447456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5147/5366/files/12329121420.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000801c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x801C 4744 bytes
SHA-256: f40307dcbf56d167cc7f4ed8b56a7b998fbeb5e8b4bc06f5ff5bde365f218255
font_01_sfnt_off00009058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9058 12492 bytes
SHA-256: fcb2d86f4a559757fe89cbc6c2ca05e632ffd21d5f0c96366ee67281fc29dec1
font_02_sfnt_off0000b821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB821 19636 bytes
SHA-256: 2ccfb158f637321a74bb89abdac090877d47e25f56d81d9dcdb4dbae48876ea3
font_03_sfnt_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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