Malicious PDF — malware analysis report

Static analysis result for SHA-256 5369daf99f843861…

MALICIOUS

PDF

76.0 KB Created: 2021-03-28 16:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2719b1191589b453a026b49f75b8347 SHA-1: d47b1f209e4180f9a9b9195ecd392a8d581484a9 SHA-256: 5369daf99f843861313e59ce0ed03a582547fb45aeae8252b60022e3ebb9a3ce
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a heuristic firing for a PDF link farm, indicating it hosts numerous external links, and a ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URL 'https://pelibifir.ru/123?utm_term=action+plan+format%252F+teenage+pregnancy' and the link farm URL 'http://kosebadujepeso.22web.org/gcfa_study_guide.pdf' are identified as potential IOCs. The document body, though heavily obfuscated, suggests a lure related to 'Action plan format/ teenage pregnancy'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/123?utm_term=action+plan+format%252F+teenage+pregnancy
    • http://kosebadujepeso.22web.org/gcfa_study_guide.pdf
    • https://xibedawik.weebly.com/uploads/1/3/4/5/134584063/1a44adf0be181.pdf
    • https://cdn-cms.f-static.net/uploads/4425919/normal_601f2f81198d7.pdf
    • https://static.s123-cdn-static.com/uploads/4476282/normal_5fe59d21818ad.pdf
    • https://static.s123-cdn-static.com/uploads/4445864/normal_5ff566f14a636.pdf
    • https://jefefobivepofo.weebly.com/uploads/1/3/4/3/134373202/a88ab73420ca.pdf
    • https://fekarerexenafot.weebly.com/uploads/1/3/4/6/134698220/5749495.pdf
    • https://static.s123-cdn-static.com/uploads/4460708/normal_5fef0cd970e55.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_b78acae25a82472ab7f46509258dabbf.pdf?index=true
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_d2d50c40148f43a99c69a0ff362d3001.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0d853fb9-fcd2-49d3-9c96-c56ee4afc69e/73069769087.pdf
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_430d0860acae47c09b8f2eeaa6ee6a6b.pdf?index=true
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_2db6a2faa1df4e20b5a9a38e78017893.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a0c872e7-98b1-4ba4-b3d8-d89277c496c5/puwogesujinofulu.pdf
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_be05bc5c120c4b32bca42047f12b5b22.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e9d47bba-4adb-4d7b-98aa-b1f17fdbfa55/flight_simulator_x_download.pdf
    • http://fukokikedusej.epizy.com/apk_anonytun_pro_terbaru_2018.pdf
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_ffbca79ae71f48529436e6ba3e353950.pdf?index=true
    • https://7fd9f749-07b0-48f8-ad51-68075edef824.filesusr.com/ugd/197648_fc2b9d027a1c4ec4926b07fd7436c70c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b7de974c-eaeb-4783-bbc3-be1a54169599/19414498693.pdf
    • http://midetimekewawa.epizy.com/luwaduvevododojonu.pdf
    • http://sunemizamaxom.epizy.com/dakokipikipoj.pdf
    • https://uploads.strikinglycdn.com/files/d781e0ae-38d0-4a8e-b834-b325ae30970a/practical_electrical_wiring_residential_farm_commercial_and_industrial.pdf
    • http://susebuxusebug.epizy.com/project_handing_over_report_sample.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_off0000eb63.bin
15964dcf702d193114b8ddf3259c0c3f421276cdae04c9aebd27d3d6d197d583		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB63 5284 bytes
font_01_sfnt_off0000fd63.bin
6ab8923b58aff051df6042d18f6be51fbc9f418814db57ac358a980663f85512		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD63 10952 bytes

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