Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31f50d525553456…

MALICIOUS

PDF

83.0 KB Created: 2021-03-17 08:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 075d9fff6be08617034a4fa5d8ca11b1 SHA-1: 7cc6247a73840209d95b7da27ed2023dc6cd7723 SHA-256: a31f50d5255534566b455e3103d4f6f7c5cd00e960d5b1335b7be7e7b20abe44
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the presence of embedded URLs and the overall detection profile suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=worm+wildbow+pdf
    • https://static.s123-cdn-static.com/uploads/4450440/normal_5fc6f649ddabd.pdf
    • http://juvovagesubo.mywebcommunity.org/25338336119.pdf
    • http://eurosett.net/attributes_of_god_tozer_listf9mwt.pdf
    • http://juxowupekabaf.mygamesonline.org/buchungsstze_ben_mit_lsungen.pdf
    • https://cdn-cms.f-static.net/uploads/4456985/normal_6023dda0658eb.pdf
    • http://tiwimifozukimu.medianewsonline.com/centrifugal_pumps_handbook.pdf
    • http://fb-ig-violation.com/82072601259s54xu.pdf
    • http://pidagenavuziw.mywebcommunity.org/61138508759.pdf
    • http://lezeninimi.medianewsonline.com/96127656758.pdf
    • http://info-pages.ru/semicolon_practice_worksheetsguw7m.pdf
    • http://xufelaketodo.getenjoyment.net/85914716617.pdf
    • http://ferabugajefelam.mypressonline.com/aplasia_cutis_congenita.pdf
    • http://edaruzal.xyz/changes_that_heal_audiobook6whge.pdf
    • https://cdn-cms.f-static.net/uploads/4413850/normal_603ab2544d1c7.pdf
    • http://cardio-natural.info/telugu_ringtones_2019_naa_songs5fmr2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/be56adf3-4bd5-4bed-ad2b-6e19fe0649b6/dyson_dc25_wand_troubleshooting.pdf
    • http://zedofaxuboz.onlinewebshop.net/60074026786.pdf
    • http://wififeju.atwebpages.com/26496665621.pdf
    • https://uploads.strikinglycdn.com/files/890ecb62-a5e6-442b-8ef0-59fd81c10599/sugebe.pdf
    • https://uploads.strikinglycdn.com/files/67ecd7fc-56f2-4c98-aa41-310ac70a4b42/rexazeluripovijinuparobi.pdf
    • https://uploads.strikinglycdn.com/files/24297e2f-ab8f-450e-819b-e090d3ec6826/16306034534.pdf
    • https://uploads.strikinglycdn.com/files/e9bc11f0-59f0-46c6-8783-4163f68740ed/plc_programming_software_for_mac_os_x.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_off00010783.bin
4f752079968250e99dc41db85c3eec05e9ebffb20bc886988de078fe7539531d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10783 5044 bytes
font_01_sfnt_off000118ab.bin
c16fa1b7c21bd94f3101ff4ba971bedddc01ab2e0c73d52bbc395ceef63c7c1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118AB 11448 bytes

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