Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00afbc581c304f4…

MALICIOUS

PDF

77.1 KB Created: 2021-06-01 10:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d858f46485e87fd2436d52451eea794d SHA-1: 29c2b93284d572be87567b8ff891a1ad467d0a3d SHA-256: a00afbc581c304f44a76f9d512dd3aa030285f4a2efae0d68df6e3510a7014e0
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection scheme. The primary external URL, 'https://irlanc.ru/pbw?utm_term=what+is+the+latest+android+version+for+note+8', is likely a lure to a malicious site. While no scripts were explicitly extracted, the PDF structure and extensive linking are indicative of malicious intent, possibly to lead users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://irlanc.ru/pbw?utm_term=what+is+the+latest+android+version+for+note+8
    • https://xabadexik.weebly.com/uploads/1/3/4/3/134376524/toruki_konifutilu.pdf
    • https://gotedajasokidu.weebly.com/uploads/1/3/1/4/131407980/8968925.pdf
    • https://static.s123-cdn-static-d.com/uploads/4369324/normal_60b1beb07dc2c.pdf
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/rufororotu.pdf
    • https://wivovomuxa.weebly.com/uploads/1/3/7/4/137499238/4022792.pdf
    • https://sizutipaji.weebly.com/uploads/1/3/2/3/132303075/023ddbfee7cdf6d.pdf
    • https://cdn-cms.f-static.net/uploads/4489976/normal_606de600b812c.pdf
    • https://penepanixefi.weebly.com/uploads/1/3/4/3/134354239/kamababojikevesuv.pdf
    • https://piwunosorelid.weebly.com/uploads/1/3/4/5/134590209/9339511.pdf
    • https://bezowaki.weebly.com/uploads/1/3/4/6/134611163/kusofigewiweveb.pdf
    • https://sumolepixa.weebly.com/uploads/1/3/4/6/134635742/worugijos_duwizuta_xebaxax.pdf
    • https://fezojeme.weebly.com/uploads/1/3/4/6/134614855/tekosukew-kiromijuxuwava-ragilegafiw-wavuremix.pdf
    • https://cdn-cms.f-static.net/uploads/4376404/normal_6014d60235ee0.pdf
    • https://static.s123-cdn-static.com/uploads/4495691/normal_5fefff08935f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2a982078-986d-475e-92c4-5fb8b617a9c6/janejejijedeguril.pdf
    • https://uploads.strikinglycdn.com/files/ccb83001-c305-4849-b06b-e280f33f3ff0/62975538901.pdf
    • https://uploads.strikinglycdn.com/files/ebfe7747-d701-40ed-9cf3-8937f4d936ea/diablo_2_remastered_2020.pdf
    • https://uploads.strikinglycdn.com/files/f986cd4d-c803-4d0d-b136-ba5844b3d765/3413711918.pdf
    • https://uploads.strikinglycdn.com/files/83fa1fd9-3210-40da-9d7b-144302307c97/obdlink_mx_bluetooth_pin.pdf
    • https://uploads.strikinglycdn.com/files/4a264649-d13e-47ec-9cbe-2be0b00e598f/jacques_ranciere_el_espectador_emancipado.pdf
    • https://uploads.strikinglycdn.com/files/37b313a5-0bad-4501-ba4b-5d19f1a8e37c/safety_1st_hd_wifi_baby_monitor_with_audio_parent_unit.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a0.bin
2ef32bd95bd0d36188311ea6ad4c10e5d8e42ecedb936b7693bed38310443eda
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A0 5048 bytes
font_01_sfnt_off0000f5c4.bin
c8dd6d8cd22594d0f5d8336ca5d6ac2632820b9d0a8c97a8f6a6f0f736ea8a3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 10188 bytes
font_02_sfnt_off000118b9.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x118B9 4324 bytes