Malicious PDF — malware analysis report

Static analysis result for SHA-256 7975b0cf69812b89…

MALICIOUS

PDF

36.2 KB Authoring application: LibreOffice
MD5: c045636c03ada4453954403459df1553 SHA-1: ea0d882260d4c1cf9d7a469547924d07043010b3 SHA-256: 7975b0cf69812b895e2393fb3708381855eecac655b6f8996dd4d12bb2147be5
192 Risk Score

Malware Insights

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

The PDF contains a large number of links to external PDF files hosted on various domains, indicating a link farm designed to obscure the true malicious destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://sarared.com/uploads/1/3/0/5/130589214/b0278e4251e9f.pdf
    • http://snowbirdhomemanagementservices.net/uploads/1/3/0/8/130874232/xenolameriv.pdf
    • http://northernrailleaders.com/uploads/1/3/0/5/130590334/d3d00.pdf
    • http://pocketbricks.com/uploads/1/3/0/3/130323181/0c7625.pdf
    • http://acumensalestrainingconsultants.com/uploads/1/3/0/4/130477490/jewuruw-nuzabawojupepan.pdf
    • http://danhixsonphotography.com/uploads/1/3/0/7/130739789/wusudisi.pdf
    • http://albemarleop.com/uploads/1/3/0/3/130313015/2273302.pdf
    • http://bikefishski.com/uploads/1/3/0/5/130588649/tubuperizigunis.pdf
    • http://stwilli.com/uploads/1/3/0/6/130639071/resanijozozeronativu.pdf
    • http://deadturnip.com/uploads/1/3/0/2/130273616/kimolurufapigobe.pdf
    • http://stokesed508webpage.com/uploads/1/3/0/6/130605504/130605504.html#apache+poi+3.17+maven
    • https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003579.bin
e69b61901553bc96825d03e3e54d097e1bb5ea5fb6dd0198b6396b34dc00a31e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3579 8760 bytes

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