Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7730dd2e4b4dfd…

MALICIOUS

PDF

80.8 KB Created: 2021-05-23 10:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ea924cd6130be997b3b83e524477b89 SHA-1: 570f8405ae34e5fe116a7e57b83f2672a1e938ba SHA-256: cf7730dd2e4b4dfdef44f09408ac9bbf1723f293334c6ed4015d4e1a16b002c2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to suspicious domains and are indicative of a link farm designed to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=rotation+90+degrees+clockwise+about+the+origin+formula
    • https://pafodezeba.weebly.com/uploads/1/3/4/5/134589846/mewarunakazu-moweguruvoj-rilamusesu-gibugawuxesuri.pdf
    • https://gogodelile.weebly.com/uploads/1/3/0/9/130969080/totebiwigulu.pdf
    • https://bazewubudib.weebly.com/uploads/1/3/4/7/134731154/4427077.pdf
    • https://wavidamos.weebly.com/uploads/1/3/4/3/134316051/mobetej.pdf
    • https://xoriforibeb.weebly.com/uploads/1/3/1/0/131071072/garet.pdf
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/811d066c516259.pdf
    • https://mitojebani.weebly.com/uploads/1/3/2/7/132711961/9249831.pdf
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/7406156.pdf
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/5068296.pdf
    • https://moxitamun.weebly.com/uploads/1/3/4/0/134040854/6831419.pdf
    • https://mewukonil.weebly.com/uploads/1/3/4/0/134096476/6495933.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/026ea9ef-c86b-49ff-aee6-3b9042beca95/gekadedegaximemaji.pdf
    • https://uploads.strikinglycdn.com/files/3d7f0454-af68-48cd-8ae4-c2fdbdac6755/mortal_engines_full_movie_download_in_hindi_480p_filmywap.pdf
    • https://uploads.strikinglycdn.com/files/4a1274c4-3826-4a7d-b25e-56411d3431a5/list_of_intercessory_prayer_in_the_bible.pdf
    • https://uploads.strikinglycdn.com/files/43af486c-c5e2-4e2d-9781-ab7141e71528/wahl_lithium_ion_beretto_clipper_review.pdf
    • https://uploads.strikinglycdn.com/files/d116cadb-97e9-441b-b938-ddeaa72f7ef7/windows_server_2012_r2_download_updates_manually.pdf
    • https://uploads.strikinglycdn.com/files/d6469dd1-ba34-4f56-873a-70f25f34ad3c/changomas_formosa_empleos.pdf
    • https://uploads.strikinglycdn.com/files/387583a9-d32e-475f-a65f-7d800b1f104c/the_specific_conductance_of_0.1n_kcl_solution_at_23.pdf
    • https://uploads.strikinglycdn.com/files/315d25ac-c89f-4494-89fb-2e577928f035/how_do_sinkholes_form_in_our_community.pdf
    • https://uploads.strikinglycdn.com/files/4535153c-8e1a-48fa-864b-b698e779b01e/crossfit_strength_training_at_home.pdf
    • https://uploads.strikinglycdn.com/files/b9487ba5-8763-4d87-b654-3e8c08ab598f/moodle_ebi_fernando_casimiro.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_off0000f8be.bin
b1e0b7412fea384d220fd158869911182f4fb0258d3c922056126ee5bf002d42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BE 6036 bytes
font_01_sfnt_off00010d3d.bin
4efb5e472672dbbeb45057896622ff2e2ec202fff1f063ca20e9bd2a293842a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3D 11768 bytes

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