Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3416f9175a27305…

MALICIOUS

PDF

77.0 KB Created: 2021-04-18 06:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 876a4708ce9e52701cf3f757c652b75a SHA-1: 891725fa87afaa2cf0ce07afd1c330ca9592d9e0 SHA-256: e3416f9175a27305986b722561fd33a4639c2ab3897cb42dda7686ba9ca3969b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM'. One of the primary external links, 'https://kuzutuzo.ru/strik?utm_term=how+to+pair+lg+magic+remote+with+lg+sound+bar', suggests a lure related to device pairing. ClamAV detection and ML classification further indicate malicious intent, likely phishing or spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=how+to+pair+lg+magic+remote+with+lg+sound+bar PDF link annotation
    • http://potuxoposutu.medianewsonline.com/tableau_your_data_2nd_edition.pdfIn PDF document text
    • http://rafupufubed.mypressonline.com/73512868628.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/megebonovagaxapiwozix.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/8c51189b-fbd6-4063-a4cc-7b7646771189/80397243088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81bc91b-418a-4980-857a-c3f22e9940ad/kitosenib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23603d64-40dd-404e-96e6-a7aa2474b457/how_to_draw_a_boy_face_easy_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a3dedb8-1aea-40c2-8d0e-756d408a5061/sony_a350_dslr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd624fb-3020-4f1c-9232-9eeea389e240/the_birds_and_the_bees_talk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a1e425-ff42-472e-8fec-925cc58cb23f/garukiveruzigipejuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/is_there_a_metro_system_in_los_angeles.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/66780413653.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/tagaxiw.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_6386507b03f44d73a7ebcfbe88995a2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutisigila/kujegasapofezotirerawinoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e493bc7d-f70e-4db8-8634-1d1c2ebe77fb/23523819174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccaf0db9-1a27-4ee5-81e7-c6d6ce996646/why_wont_my_3d_printer_print.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83da9b08-0396-4898-8bf3-e7f7c8d5334b/duweg.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/40890773254.pdfIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_1457115d166b4e88b3fa687e79dd6058.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanubili/52273357041.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/27041750512.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 5680 bytes
SHA-256: f36e432b15a76365fbca6cccd1a059576d90153811bcc64a0bc6bbe843df2169
font_01_sfnt_off00010152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 10844 bytes
SHA-256: a9a3d29a3a5177e40d28cd9d2163786c03468107d08e75f6fa22b15b9499f817

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