Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e7d045f34d3d8a…

MALICIOUS

PDF

78.9 KB Created: 2021-04-08 09:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1bc29078ba5adbb022d8f874cfa0edab SHA-1: 2a41197b4601a19e6b957617002908c038f77a94 SHA-256: 81e7d045f34d3d8ac5c366393c536044712091e411f92dfe5da8dc8b19e59098
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-related and point to other PDFs, suggesting a link farm or content-laundering operation. One prominent URL, 'https://xezojetit.ru/wix?keyword=statistics+of+inheritance+pogil+answers', is presented as a search result, indicating a potential lure for users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://xezojetit.ru/wix?keyword=statistics+of+inheritance+pogil+answers PDF link annotation
    • https://cdn.sqhk.co/kifavubivelo/Bsgc4hj/zixoxomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_603e84542d21b.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/jeTichg/air_traffic_controller_age_limit_35.pdfIn PDF document text
    • http://rejamar.sportsontheweb.net/88158638666.pdfIn PDF document text
    • https://pigiburoletu.weebly.com/uploads/1/3/2/6/132695467/bixevulomezop_rijisonefek.pdfIn PDF document text
    • http://seweripuwas.mywebcommunity.org/singapore_master_plan_2020.pdfIn PDF document text
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/ee7459e.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/cigji9e/84786318032.pdfIn PDF document text
    • https://fojomifurinu.weebly.com/uploads/1/3/1/3/131378835/binedazelenizuw.pdfIn PDF document text
    • https://cdn.sqhk.co/juselivo/Ugeiehi/52429675068.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_5fc59c4f616ff.pdfIn PDF document text
    • https://cdn.sqhk.co/govibabika/bkzd511/simcity_buildit_cheat_for_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417208/normal_605004171634b.pdfIn PDF document text
    • https://zuragani.weebly.com/uploads/1/3/1/4/131438510/1059475.pdfIn PDF document text
    • https://bilugejedegigel.weebly.com/uploads/1/3/4/0/134017605/wukuti_zuvukadoruzed_nujanima.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/background_biru_tua.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/86935596373.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/keyboard_android_aosp_terbaru.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/rutiwugokerefaru.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/katitobituxefilamevu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/21963211824.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/acer_aspire_3_amd_4gb_1tb_windows_10_home_laptop.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/18630217729.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26D 5260 bytes
SHA-256: 7d5e040549aeb1c02315e7a2b47ef0519ae7775a4dc37b129161e5084e367bc0
font_01_sfnt_off0000e43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43E 10852 bytes
SHA-256: 01ada35fdafe09e72ae7d8a6de61890cf88fc05ee84b5d752a7f0976a2b3134c
font_02_sfnt_off0001080b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080B 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
font_03_sfnt_off00011cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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