Malicious PDF — malware analysis report

Static analysis result for SHA-256 686d73052126768d…

MALICIOUS

PDF

43.4 KB Authoring application: Scribus
MD5: d2bcb91880e4cdf8f00050d792fdd45b SHA-1: 8533b8477b75c759543f7d3f39967a0b06a646b7 SHA-256: 686d73052126768dadb2147c44f73ba0e6c03eae8d9d3ebc336cb47c3453097b
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the sheer volume of outbound links suggests a coordinated effort to redirect users to potentially harmful sites.

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://refle-x-tions.club/uploads/1/3/0/6/130639802/zarasibuledi.pdf
    • http://joswin.in/uploads/1/3/0/4/130483163/3066884.pdf
    • http://rekwiredcosmeticsllc.com/uploads/1/3/0/2/130271067/kefofinixosujuw.pdf
    • http://translatorquote.com/uploads/1/3/0/5/130590295/jaxovoludebiduges.pdf
    • http://queenbeenails.net/uploads/1/3/0/5/130543065/aa60b62ee1ccc4.pdf
    • http://slsfnc.com/uploads/1/3/0/7/130738614/xosaja-desowaw.pdf
    • http://invitingways.com/uploads/1/3/0/8/130814187/fibetifamajufu-lobedewisopab-wuxalamisuluzo-setojonawasid.pdf
    • http://nikkishandmadeboutique.com/uploads/1/3/0/6/130604079/jujugapuboxotim.pdf
    • http://jasonduty.com/uploads/1/3/0/5/130541688/5159052.pdf
    • http://www.katherineschultebiologyclassifacationproject.com/uploads/1/3/0/7/130739578/7068210.pdf
    • http://pitchtreemetalworks.com/uploads/1/3/0/5/130543289/junor.pdf
    • http://indiecomicshub.com/uploads/1/3/0/6/130604200/selulokep_wiwodabi.pdf
    • http://mnnewfs.com/uploads/1/3/0/5/130588861/4729216.pdf
    • http://budapestartsociety.com/uploads/1/3/0/6/130621717/3555191.pdf
    • http://ehrbutton.com/uploads/1/3/0/3/130313054/lojurufapenuw.pdf
    • http://rainflowpro.com/uploads/1/3/0/4/130483276/892a826548.pdf
    • http://rebeccasiswick.com/uploads/1/3/0/8/130874329/jemome.pdf
    • http://bridgestreampublishing.com/uploads/1/3/0/9/130969131/130969131.html#email+cover+letter+with+attached+resume+examples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a8a.bin
f97ba26f3a7de93d3c1d62951a7e0e66c940cfd5c517178c2a1a8de60c9b0246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8A 9016 bytes

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