Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32f56f227854fde…

MALICIOUS

PDF

103.2 KB Created: 2020-12-24 06:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 125d91b974075df2139fad673ed0adba SHA-1: d0f3ce1ab4a730cd5b4c7c65c1a413633ac810a2 SHA-256: d32f56f227854fde9a6277bb99b4356ef1fa0a6c2b6e72e93439f79b0a0fad3e
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a redirector link to a potentially malicious domain. Another heuristic indicates a link farm designed for SEO poisoning. While no scripts were extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=bharathiyar+history+in+tamil+pdf+free In PDF document text
    • https://vodemiteju.weebly.com/uploads/1/3/4/7/134722100/5385798.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/rjj1jb2/32108777559.pdfIn PDF document text
    • https://cdn.sqhk.co/nolugavetiri/ijgZhdN/zovenorodoveror.pdfIn PDF document text
    • https://cdn.sqhk.co/ritafase/RjacijT/nilokujedosug.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/levumoduf/album_songs_status_tamil_video.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/salon_care_40_volume_cream_cvs.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/kulufureposefatiwojaliso.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/organon_aristoteles_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/59702044118.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/71062876503.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/free_editable_cheque_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/lekipabupes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb8b5f0-cc19-4f80-a23a-ea3ff6a3e494/17593453963.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/vilibusagigogotaz.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000112eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x112EB 18908 bytes
SHA-256: 9eac11850791e6d59637ef8319c5bd5b5c982ab206cb2977fb6b1846b721788b
font_00_sfnt_off0000f714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF714 2888 bytes
SHA-256: a34f6133241b0e53c3cfe1f853016e916a3d7180b6d3b88390408fd04f35e9f6
font_01_sfnt_off00010158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10158 5220 bytes
SHA-256: 9928721bd0fed88d25537a4793554c5e559dc13949e18ab1428179643d6a2940
font_03_sfnt_off00013b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B56 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_04_sfnt_off000146ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BA 10284 bytes
SHA-256: 410f25e042700fccafd9aceab3e38fbcd5a89b12025defd9e8cc595f39f7efac
font_05_sfnt_off00016a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A2A 16164 bytes
SHA-256: b21434860209bcfa4faa45743010641f853ea3cc1b0bad42541eb31f339e130c
font_06_sfnt_off00017f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F49 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176