Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c6d48ec6e4f27d…

MALICIOUS

PDF

50.3 KB Created: 2020-03-23 15:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a946effb2a549bfc68ebd5f79574ca12 SHA-1: 028c89c6c16ec61ced397540dcb7a9c10783bff1 SHA-256: 54c6d48ec6e4f27dd57bdca1f5ccbfda30ecc08c31df02b16971aae890877c3b
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains the phrase 'Q significa ictiolog\'a' and a URL that matches the first link found. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://secure-pof.com/uploads/1/3/0/3/130313145/130313145.html#q+significa+ictiolog%C3%ADa
    • http://www.magicmudceramics.com/uploads/1/3/0/5/130539059/5e8a11d182e4.pdf
    • http://karynscreations.net/uploads/1/3/0/6/130620746/9245e73a2834ce.pdf
    • http://massagesandysprings.com/uploads/1/3/0/2/130288887/71cb33ad.pdf
    • http://annmorris-crossings.com/uploads/1/3/0/7/130776043/tosufib_fetajapavixufu_rozazi_jisexetawuw.pdf
    • http://www.clearhrsolutionsd.com/uploads/1/3/0/2/130287462/kopozutogewakiz.pdf
    • http://www.mol650eraywebster.com/uploads/1/3/0/5/130540134/sijanufuxawidu_kitisupadam_zotit.pdf
    • http://london-office-2.pleasingfood.com/uploads/1/3/0/5/130589397/7227585.pdf
    • http://suncitylibraryfriends.com/uploads/1/3/0/2/130288798/wafejukefok.pdf
    • http://www.surmonte.net/uploads/1/3/0/5/130589231/505557.pdf
    • http://sbtkidz.com/uploads/1/3/1/1/131164043/2abec8beef.pdf
    • http://www.loppnows.com/uploads/1/3/0/8/130873872/8815879.pdf
    • http://www.crabbybirds.co.uk/uploads/1/3/0/5/130540178/27c00a33.pdf
    • http://bodyworkbybarb.com/uploads/1/3/0/4/130436139/903cdc739087.pdf
    • http://hostmaster.allaboutyourbiz.com/uploads/1/3/0/5/130590724/4104582.pdf
    • http://www.188prospectstreetu1.com/uploads/1/3/0/6/130622023/zosikun_pufefegotomiza_mifosaw_vereruzigage.pdf
    • http://www.cuttingedgelawncare.org/uploads/1/3/0/2/130291463/17ee3884.pdf
    • http://www.dirtydeedsalaska.com/uploads/1/3/0/8/130813401/mirujomexafaxim.pdf
    • http://theflowersonbroad.com/uploads/1/3/0/5/130590443/ecffde94fe75a2a.pdf
    • http://www.lifestrategiesbc.com/uploads/1/3/0/6/130621293/41fff6f274a.pdf
    • http://lynn-liu.com/uploads/1/3/0/2/130271245/tolawanisotezimer.pdf
    • http://mta-sts.michisboutique.com/uploads/1/3/0/3/130313484/a4ba58487cda1f.pdf
    • http://steerking.us/uploads/1/3/0/4/130436282/3873155.pdf
    • http://bettiefordwasteland.com/uploads/1/3/0/7/130738513/zutoxafegadugu.pdf
    • http://steerking.us/uploads/1/3/0/4/130436282/38731
    • http://dgheslep.people.ua.edu/uploads/1/3/0/4/130483158/vufepovunir.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007990.bin
d665972be7700553d61883a33d2cdc5d679a478e41f72db4bc55d278fe40a0f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7990 10204 bytes
font_01_sfnt_off00009ae6.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE6 2652 bytes
font_02_sfnt_off0000a44d.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA44D 16036 bytes

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