Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4fec41dc8f82d79…

MALICIOUS

PDF

134.4 KB Created: 2021-05-28 05:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0e7d6de6dc63acbd1c16e88ff2fe1ca7 SHA-1: b876ace572159b3783742c99b30302e872e54d42 SHA-256: f4fec41dc8f82d79264c2ecce9d6cbeb033dcb948a6fe425b6b126840bdfff92
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO manipulation or phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and one prominent URL points to a search term related to downloading a bible. While no scripts were directly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely related to driving traffic to malicious sites or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=ethiopian+orthodox+bible+in+english+free+download+pdf PDF link annotation
    • https://mezonojasu.weebly.com/uploads/1/3/4/6/134639114/xakatiken.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385412/normal_5fc66733843f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471711/normal_6023f5671eaaa.pdfIn PDF document text
    • https://vusuvokitajize.weebly.com/uploads/1/3/0/8/130874031/foxepo.pdfIn PDF document text
    • https://rifewageza.weebly.com/uploads/1/3/5/3/135349229/6502727.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379601/normal_5fe52d7d393a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464851/normal_6014f4774a46a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498992/normal_5ffaca9c1c4c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_6065214431f5a.pdfIn PDF document text
    • https://bidiguregila.weebly.com/uploads/1/3/4/7/134700143/9007876.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://uploads.strikinglycdn.com/files/a0b5ec1d-41de-45ab-8281-b51be9efdf45/81004339127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ec3b89-8e3a-43ba-a565-fa3c92f2a25e/twitter_icon_emoji_copy_and_paste.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae5ba54-3d89-4d8e-b936-179cf125fb93/quimica_organica_formulacion_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b070d49-a87a-41b7-869f-5ffa8ec6f98e/philips_respironics_bipap_autosv_advanced-system_one_with_humidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45077afc-a11b-451b-a399-696273fe5b39/fesabaxavonigafama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da22e41b-ea66-4450-831b-f9af2590f02b/rolikaxibexar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4371008e-d428-4c95-abc8-ef0354da37cc/mikazupipifofubanotovivag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20ce24e9-0d87-4db6-9b37-a9323fae95ea/38272155978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff28801-8681-4b04-860c-3599132b9e30/how_to_fix_f2_code_on_ge_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/597ee293-d57b-41fb-8670-d1741173af9f/ashrae_handbook_2017_fundamentals_i-p_and_si_editions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c18ed38-8ae5-4929-a8c3-cd46eb992d9e/dead_sea_scrolls_compared_to_masoretic_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d86e184-b31b-4a0c-a95e-73afd6e79a6a/28832080411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/312c8d3e-18e7-4d1d-8f85-73d5590d763d/samsung_bluetooth_keyboard_not_working.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000156ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156FF 31132 bytes
SHA-256: 856c40bcccd64cbd611bfff97ed483d81d481c54af46794cb829a198a18c7efa
font_01_sfnt_off0001a995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A995 5348 bytes
SHA-256: b665f27ce089443b504a59b4c97ffedac4aea6cab1d092038059c75cf0ee4296
font_02_sfnt_off0001bbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBC8 12788 bytes
SHA-256: ff4147f11004d8db4afc9264f6dd38d17d29a4e072a6d0935bf259c29c585fce
font_03_sfnt_off0001e5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5F3 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
font_04_sfnt_off0001fabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FABB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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