Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1b492089ad580a…

MALICIOUS

PDF

67.4 KB Created: 2021-06-03 07:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cadc29db2356968aae563857f40b07a4 SHA-1: d877ef47f8eecf7d71220810c30d6b9b4efa8416 SHA-256: dd1b492089ad580aa6d7812e2b10ac5cd449292c64afe99659805280faa4fdda
156 Risk Score

Malware Insights

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

The file is a PDF containing numerous external links, with one prominent link pointing to a suspicious domain ('smidgel.ru') that is likely part of a phishing or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/pbw?utm_term=calendario+2020+pdf+mexico
    • https://cdn-cms.f-static.net/uploads/4379859/normal_605a6b3d382f1.pdf
    • https://xudisuwovoj.weebly.com/uploads/1/3/5/4/135400752/6431608.pdf
    • https://medekokimezud.weebly.com/uploads/1/3/4/7/134748457/tulexekalog_matujiwufiti.pdf
    • https://siwinapevaz.weebly.com/uploads/1/3/4/3/134338690/meduvevudi.pdf
    • https://static.s123-cdn-static.com/uploads/4417315/normal_5ff3a7be099d2.pdf
    • https://vatatolomaz.weebly.com/uploads/1/3/4/4/134495066/risenimivukafurumane.pdf
    • https://mabajiluvepe.weebly.com/uploads/1/3/1/4/131409333/2f79e8cf4da2a.pdf
    • https://cdn-cms.f-static.net/uploads/4408180/normal_606ace18c8064.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1e228f45-86dc-4d19-8874-bb96bc6b6734/65701951894.pdf
    • https://uploads.strikinglycdn.com/files/ae249fb7-d99f-4e12-a360-edff0246c331/united_as_one_pittacus_lore_ending.pdf
    • http://sajateves.pbworks.com/w/file/fetch/144470283/dakoxemezus.pdf
    • https://uploads.strikinglycdn.com/files/c998ce2c-02ce-47fc-b570-98833cf7c010/how_do_you_write_a_good_speech.pdf
    • https://uploads.strikinglycdn.com/files/5b1efa51-f05c-4cc7-b962-a2d8c0861c99/who_invented_bulb_first.pdf
    • https://uploads.strikinglycdn.com/files/8745dddf-b256-4a75-a10a-3496395724ac/87001310937.pdf
    • https://uploads.strikinglycdn.com/files/3499f097-dfc9-4bb2-8fc5-c483e960d43e/rakujajarugegoro.pdf
    • https://uploads.strikinglycdn.com/files/7d2df60a-5144-4ab8-b11c-0fca0a8e61a1/t_tess_goal_ideas.pdf
    • http://sijomirurefi.pbworks.com/w/file/fetch/144461334/monsters_inc_university_google_docs.pdf
    • http://mutoteja.pbworks.com/f/cooking_demonstration_speech_outline_sample.pdf
    • http://xorunezagu.pbworks.com/w/file/fetch/144438456/14277064237.pdf
    • https://uploads.strikinglycdn.com/files/62a217c0-2184-41ff-abba-ae05a6625db1/fewagi.pdf
    • https://uploads.strikinglycdn.com/files/5d555608-043d-49f6-a4a8-1e0f976c85f4/rival_crock_pot_stoneware_slow_cooker_manual.pdf
    • http://gosirata.pbworks.com/w/file/fetch/144446604/is_valguero_good.pdf
    • https://uploads.strikinglycdn.com/files/89c05acb-f826-4027-ae8e-386a8c7a4e2e/jebusiza.pdf
    • https://uploads.strikinglycdn.com/files/52b928c0-a078-4a4f-bcdc-f1c0cc2d62ec/public_administration_masters_programs_philippines.pdf
    • https://uploads.strikinglycdn.com/files/3fc5abf4-eef0-4e8b-b088-cf4e7783141b/lidubixoruzanolanewosut.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc81.bin
99b81c316fee771676eb159308722890fe26dd3c225d0798b984e8c01709147f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC81 5372 bytes
font_01_sfnt_off0000deae.bin
a9520b58e28ca9f9bf22ae84e7d3918bd0117ac4fd55cbadd08cdad0a7ad3e2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAE 9912 bytes

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