Malicious PDF — malware analysis report

Static analysis result for SHA-256 58519bc2f0b82356…

MALICIOUS

PDF

54.8 KB Authoring application: Smallpdf Desktop
MD5: 28e2c9064c28adfa7ab1fcc91db07801 SHA-1: 9d70fb1e172f5f962745444b15d98162608fc6d1 SHA-256: 58519bc2f0b82356c358fd66b288eb2dc8c258d091cad78fdd64804b9c5a904f
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing attempt. The critical PDF_SEO_LINK_FARM heuristic indicates the presence of a large number of external links, with the first identified as http://megadromlabs.com/uploads/1/3/0/6/130640062/9197251.pdf. This suggests the document's primary purpose is to redirect users to potentially harmful websites, possibly for SEO manipulation or to serve further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://megadromlabs.com/uploads/1/3/0/6/130640062/9197251.pdf
    • http://computatumservices.net/uploads/1/3/0/5/130551247/bizoletowixap.pdf
    • http://hustleandheartbeauty.com/uploads/1/3/0/2/130289623/gujeladefuxako_mogutopavik_jiluxasewesotok.pdf
    • http://nobleberean.com/uploads/1/3/0/9/130969436/798fd0d0.pdf
    • http://northerncoloradofarrier.com/uploads/1/3/0/5/130551739/40f19f641f8c.pdf
    • http://comedywonder.com/uploads/1/3/0/2/130289630/nisedifavekorozifu.pdf
    • http://northshoreengineeringny.com/uploads/1/3/0/3/130323127/ced19583cc9.pdf
    • http://runawaytidegeneralstore.com/uploads/1/3/0/2/130272886/puluvo_kometadevutojep.pdf
    • http://sonyakrakoff.com/uploads/1/3/0/2/130288986/5612607.pdf
    • http://mycastlemanagement.com/uploads/1/3/0/2/130289729/8793502.pdf
    • http://4550preslyn.com/uploads/1/3/0/5/130588672/riwimadusus_debesep_pupifigosepat.pdf
    • http://postmaster.iki-cc.jp/uploads/1/3/0/5/130551041/pugil_defax_lasun.pdf
    • http://pdvintage.com/uploads/1/3/0/5/130589397/jukexusezo.pdf
    • http://harold-stanley-junior.pleasingfood.com/uploads/1/3/0/6/130639317/130639317.html#b.ed+books+in+gujarati+pdf+free+download

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003141.bin
da097a8c459adbfdf1b1d97412e41569b305acf822c6e113ff3e46e38a168572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3141 16224 bytes
font_01_sfnt_off00004618.bin
236d54f3e2479d5e72da3d1be4616617e509581c3e9108e812f40a19f40d28ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4618 2228 bytes
font_02_sfnt_off00005128.bin
b12b7f18d280f193b5a02fbfa6a666316a55e435374b0561dc14226347eb6da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5128 15380 bytes
font_03_sfnt_off00007be0.bin
01684ad5fad16f825ec5028310f1dd9e46e07eab26c7734ffc376e742848527b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE0 8388 bytes

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