Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac7de14d2728b6c…

MALICIOUS

PDF

45.1 KB Authoring application: Poppler-utils
MD5: cae1aff3da0efbecaf97c09fe178403f SHA-1: 730ae0696abe497aaaedbed6360faabfdcc87d84 SHA-256: 9ac7de14d2728b6c865b3e003e9decb9492f0b45180e1acea038e6f5d83ae097
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest a phishing or malware distribution campaign, aiming to redirect users to potentially harmful content hosted on these domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://peluburezawin.weebly.com/uploads/1/3/0/3/130323409/8735113.pdf
    • http://gypsydenisse.com/uploads/1/3/0/6/130640028/bajome.pdf
    • http://vagavejex.studentcareer.ru/uploads/2020/01/29/zexalodezezagarug.pdf
    • http://wujav.bbjgamestore.com/uploads/2020/01/28/849073.pdf
    • http://nationalfootballcheerleadersalumni.org/uploads/1/3/0/4/130488732/130488732.html#icd+10+code+for+acute+inflammatory+colitis

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000105a.bin
221e1566886c8822a9ff7ff74b51b3393750477d582c2ca694c79ff94144e5a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A 8412 bytes
font_01_sfnt_off00006135.bin
1b3f82cd74c5b6671cc0c0d4a6c7877b74bb57ca469b2a61ef541918e41af838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6135 2652 bytes
font_02_sfnt_off00006a02.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A02 16036 bytes

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