Malicious PDF — malware analysis report

Static analysis result for SHA-256 2636b25102910fd7…

MALICIOUS

PDF

42.2 KB Authoring application: Smallpdf Desktop First seen: 2020-09-24
MD5: 193a57667c06d4b0f5846b21de45fe63 SHA-1: f56f70d587e1ae33f4242bd04e09a657a4ae78ea SHA-256: 2636b25102910fd772ce57781a5a9ff9547b98da362b24ad7d0d3828252d0f5f
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of 31 external links, with the first being http://vigilanttool.com/uploads/1/3/0/6/130605237/rorugas.pdf. This suggests the document is likely used for distributing further malicious content or for SEO-based traffic redirection, rather than containing a direct exploit or payload within itself.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://vigilanttool.com/uploads/1/3/0/6/130605237/rorugas.pdf In PDF document text
    • http://studentsfirstedu.org/uploads/1/3/0/7/130776500/rojuguvajeta.pdfIn PDF document text
    • http://denzelhurd.org/uploads/1/3/0/7/130739773/a32ddb68.pdfIn PDF document text
    • http://www.stemfootwear.com/uploads/1/3/0/7/130775023/zuzimizi-luguwik.pdfIn PDF document text
    • http://paradigmclothing.shop/uploads/1/3/0/7/130775929/3a071f1e386.pdfIn PDF document text
    • http://www.themortgageteam.org/uploads/1/3/0/5/130589010/ralabawalowajo.pdfIn PDF document text
    • http://ibestamped.com/uploads/1/3/0/7/130739265/vejuralirojaj_dogajixukijimi_borexifarafina.pdfIn PDF document text
    • http://heysatan.org/uploads/1/3/0/6/130604644/jejepifekumapulez.pdfIn PDF document text
    • http://nebraskansunitedforthegoodlife.net/uploads/1/3/0/2/130273623/7705674.pdfIn PDF document text
    • http://jurandirsilva.com/uploads/1/3/0/2/130289301/2691076.pdfIn PDF document text
    • http://friendsweatherapp.com/uploads/1/3/0/6/130621805/ea0b8c.pdfIn PDF document text
    • http://calciopreviews.com/uploads/1/3/0/5/130539492/666df9ec8c3f83.pdfIn PDF document text
    • http://dynamicslogic.info/uploads/1/3/0/4/130483043/ef9506bc6e6e2f.pdfIn PDF document text
    • http://www.beastedart.com/uploads/1/3/0/6/130620971/wepoxulokovuti.pdfIn PDF document text
    • http://stevensmondata.com/uploads/1/3/0/5/130540178/fotawetu_palus.pdfIn PDF document text
    • http://gotmonks.com/uploads/1/3/0/5/130590036/fb2cab34669d.pdfIn PDF document text
    • http://nuvisionconstruction.com/uploads/1/3/0/2/130289410/fa0833ce1691cea.pdfIn PDF document text
    • http://oakclass.com/uploads/1/3/0/3/130379293/7869349.pdfIn PDF document text
    • http://hawthorneblossoms.com/uploads/1/3/0/6/130604090/diweludibup_xoduwaloka_mawajasuzufiwib.pdfIn PDF document text
    • http://amppickleball.org/uploads/1/3/0/8/130814161/nusotoxupenubobop.pdfIn PDF document text
    • http://74-123-78-173.mgwnet.com/uploads/1/3/0/4/130476586/130476586.html#afterglow+wireless+headset+xbox+one+no+soundIn PDF document text
🗂 Part of campaign: 12ster.com 5 samples

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4205 10276 bytes
SHA-256: 9517b7b2f087fd1c3277575b80d2d0b868e752a90d20d6755b8cd1bee0a6ae32

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