Malicious PDF — malware analysis report

Static analysis result for SHA-256 072d8e32aeb48520…

MALICIOUS

PDF

71.6 KB Created: 2020-11-09 22:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a34538ef215d21da5a35e43796972e65 SHA-1: 90354aebfa552b78a935e867979ba82b1aada83d SHA-256: 072d8e32aeb4852095ed873de43e0868913290ca7c4cc82edc646c5eaf7875fd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The file contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO manipulation tactic. One of the embedded URIs, 'https://trafftec.ru/aws?keyword=red+elephant+club+montgomery', is particularly suspicious and likely serves as a lure or distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?keyword=red+elephant+club+montgomery PDF link annotation
    • https://bigubuwona.weebly.com/uploads/1/3/4/3/134309174/66c1d6.pdfIn PDF document text
    • https://fubasuwa.weebly.com/uploads/1/3/4/6/134611144/zojimege.pdfIn PDF document text
    • https://wipiduwofudozi.weebly.com/uploads/1/3/4/5/134588456/3648dc6196d038.pdfIn PDF document text
    • https://luwosixikitap.weebly.com/uploads/1/3/4/6/134628352/155f3a4f615019.pdfIn PDF document text
    • https://lesorini.weebly.com/uploads/1/3/4/3/134376350/eed0c9a5d.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/2cbba0.pdfIn PDF document text
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/9032611.pdfIn PDF document text
    • https://bixanizutojez.weebly.com/uploads/1/3/4/4/134490846/6044465.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec431524-d8df-44c6-92fa-d7307aad1139/36697199763.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/convert_to_word_greek_ocr.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/gabopepesizatopole.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/82772320883.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/dirt_bike_games_online_unblocked.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.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC840 5556 bytes
SHA-256: 904b73bcd558eac7e9980cdef3c94c4c50293e7b8cf0e60638f015c5a20d880c
font_01_sfnt_off0000daef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEF 6068 bytes
SHA-256: d2d10b6b0c668cf26faa9347c7054f8580c7eefa5cb7aecda2a4fba74bd025f0
font_02_sfnt_off0000eaa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 11140 bytes
SHA-256: 067277bb09beb5d6b958d7238b8be040176ff21aac8428c736ce726e9ccd3cca

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