Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6fd9bab562245da…

MALICIOUS

PDF

75.2 KB Created: 2021-03-04 16:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ad0e8e990f24ae3d4aed16147c761040 SHA-1: 36a0e31c0ee1356900e454e1698ca0e21352d62f SHA-256: d6fd9bab562245da7e5ec66f83d63b06e1a4a488bde1fc78ebf539cc2f8c991a
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous external URLs embedded within it. The primary URL, 'https://resalured.ru/wix?keyword=boinga+backyardigans+lyrics', suggests a potential lure or SEO manipulation tactic. The presence of multiple links on disposable hosting platforms, combined with ClamAV detection as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', strongly indicates malicious intent, likely to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/wix?keyword=boinga+backyardigans+lyrics PDF link annotation
    • https://gelujesu.weebly.com/uploads/1/3/4/8/134847850/9458938.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/bekojatoxunimow_jajijunidawum_labelulusoxewo_madatosufaj.pdfIn PDF document text
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/6448227.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/lelegiwo-patokuf-kezefot-papexe.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/apc_back-ups_cs_500__replace_battery.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_6012b1d129c61.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/gusubagixofomim.pdfIn PDF document text
    • https://kadonomu.weebly.com/uploads/1/3/1/4/131454950/vimanuzu.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/kuwelaxor_nepumuderetaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393916/normal_5fe28b86d7746.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/9094807.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/noninuvimajogesenave.pdfIn PDF document text
    • https://wavidamos.weebly.com/uploads/1/3/4/3/134316051/249056.pdfIn PDF document text
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/wunafujo.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/figup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_6032f3ba33a34.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/ae7f7c60-1eea-4e1a-85eb-ca1c850602bb/papobopisob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50ad74d-f61f-40a1-8975-1220e6f59ec7/autodesk_sketchbook_pro_free_download_apk.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/how_did_world_war_1_affect_europe_economically.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08bf7151-3018-4f28-8d08-50585e2447ce/model_3_sr_plus_range_increase.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_off0000d0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E4 5464 bytes
SHA-256: 9ed481c5af731891c4a845d10d40327754f697e273e8890da8ea76a20e4b7630
font_01_sfnt_off0000e391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE391 10512 bytes
SHA-256: affcc9d87700b743ae69ac4a83102a5d9e0dc31aa80a6a6ca8e230d550c3bf3b
font_02_sfnt_off000107b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B5 16752 bytes
SHA-256: 702db90d42636ecfbb1414188bfcce8466f506840e16ce24213d65cd16988d67