Malicious PDF — malware analysis report

Static analysis result for SHA-256 acaae688b9c0ff32…

MALICIOUS

PDF

83.0 KB Created: 2021-04-02 06:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 88640c9dc161d86d1d9422f79018c7b8 SHA-1: 580a2003aa027a532e974e9cf81fa36f9aba5c1c SHA-256: acaae688b9c0ff32364662613a4614f2792ae54e3fb6613361cfcfa511ab5d76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://botokaw.ru/wix?keyword=raw+apk+showbox+app+download', indicates a lure to download potentially malicious applications. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://botokaw.ru/wix?keyword=raw+apk+showbox+app+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378404/normal_5fe513a407d2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492246/normal_601d150023453.pdfIn PDF document text
    • https://putomusozozor.weebly.com/uploads/1/3/4/3/134321488/kopekek.pdfIn PDF document text
    • http://fixegemixinazoj.22web.org/chess_titans_3d_windows_7_free.pdfIn PDF document text
    • http://xomuxurek.22web.org/why_is_my_hotpoint_washing_machine_not_filling_with_water.pdfIn PDF document text
    • https://dutukoviwu.weebly.com/uploads/1/3/0/8/130873875/giwenaxera_lesez_wotolesudapira_topuj.pdfIn PDF document text
    • https://mewasopaligesar.weebly.com/uploads/1/3/1/4/131454012/norojilavotafadulalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_6023f4d2434a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382405/normal_604d7b24086c7.pdfIn PDF document text
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/2458734.pdfIn PDF document text
    • https://xuwekakef.weebly.com/uploads/1/3/1/8/131856316/suwatisegan-mononepimo-jofoka-gunobota.pdfIn PDF document text
    • https://linajijokib.weebly.com/uploads/1/3/4/0/134000065/ec5a8.pdfIn PDF document text
    • https://lokugejepotag.weebly.com/uploads/1/3/4/3/134318746/af1ceb8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417645/normal_5fdb5a22db4aa.pdfIn PDF document text
    • https://jejonogukoji.weebly.com/uploads/1/3/4/8/134864124/6541.pdfIn PDF document text
    • https://nidexopike.weebly.com/uploads/1/3/1/4/131407316/sixujexepizar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/33587221446.pdfIn PDF document text
    • http://xipobibupo.epizy.com/where_is_a_christmas_carol_playing_on_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/basketball_stars_apk_mod_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/bring_me_to_life_bass_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/95341315811.pdfIn PDF document text
    • http://xorikija.epizy.com/stegosaurus_skeleton_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/mechanical_engineering_jobs_in_india_for_freshers_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/tuludolelimunipirilifuneb.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/3421271659.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/61608471118.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_off0001064f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064F 5324 bytes
SHA-256: 00b85b41efde022404f68aff53f4d9443f6938c6db627f90ddcc2f01354cf2a2
font_01_sfnt_off0001187a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187A 11108 bytes
SHA-256: 9bcac939c96ad39f4702fdd86df81d9ea543dc614d6ee227b9ba31736fad5b43