Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdfaded7ffa00e1…

MALICIOUS

PDF

94.8 KB Created: 2021-03-24 14:25:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 740aab9a3cb336dbe0a0f8002a464ce1 SHA-1: 9ba297e660081ecef64ad6fbbd778ef7b3a72f80 SHA-256: ccdfaded7ffa00e127a4097d1feb3bd1c9788314f75818d88b7eb933994159fa
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=cisco+catalyst+9400+datasheet+pdf PDF link annotation
    • https://kugixixubeleji.weebly.com/uploads/1/3/4/3/134324677/9539305.pdfIn PDF document text
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/rojuka.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/hiijEB0/xixuxoxusijekafa.pdfIn PDF document text
    • https://cdn.sqhk.co/dukasavubu/dFhbFjQ/international_business_machines_ibm_corp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c28dff5-666a-4aa3-9fe1-679865db3561/how_to_grade_words_their_way_inventory.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/kepevomoxasurami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79d7c9f-0bff-4f14-a435-18569a8c5af0/31604995656.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/80619148404.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/tumixakubariwolofa.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/gikifezokapeneraxobodu.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/warhammer_40k_8th_edition_core_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/how_much_is_a_nintendo_ds_lite_in_the_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/how_to_write_a_good_case_note_law.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/valkyrie_anatomia_story_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/tubotadila.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/falan.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/apollo_twin_x_windows_10_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/37195261058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede516f7-7f59-45fe-bfb6-6eb09c7de961/was_rome_the_largest_empire.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4D 5540 bytes
SHA-256: ed968997a4508c267486c4380399fd45995b242dbf9467a7f190e82502cbcfde
font_01_sfnt_off0001312e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312E 11876 bytes
SHA-256: 34a1f3419a16130ece965687f99395f0f4eddb81aee7486e70c5951e0bcad00e
font_02_sfnt_off0001594b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1594B 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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