Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f82d1331c9d986b…

MALICIOUS

PDF

61.1 KB Created: 2020-03-10 06:58:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d5c437d38f434fe51fbdd6548ddf5633 SHA-1: 886c377d5cb8e64c104b8349a2e9228ba275c964 SHA-256: 3f82d1331c9d986b92644adb635e02a7f45334cebb337bfac498e0a1d9fafe26
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO poisoning attack. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to 'automated attendance system project ppt' and URLs that appear to be part of a link farm, reinforcing the lure to external content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://chaddock-family.rominastiebenphotography.com/uploads/1/3/0/7/130775605/130775605.html#automated+attendance+system+project+ppt
    • http://haydnhite.com/uploads/1/3/0/5/130590164/66e0026.pdf
    • http://amazonverkaufsmaschine.com/uploads/1/3/0/2/130270971/7308785.pdf
    • http://nakitahogans.com/uploads/1/3/0/4/130483397/divixelamakezademalo.pdf
    • http://succulentsbayarea.com/uploads/1/3/0/6/130620975/e062a0701adf172.pdf
    • http://www.topguntattoouk.co.uk/uploads/1/3/0/3/130313102/63af2cd141a.pdf
    • http://dsocial.info/uploads/1/3/0/6/130620795/fobugazimevo.pdf
    • http://www.littlesinscupcakery.co.uk/uploads/1/3/0/4/130489172/lesuxu.pdf
    • http://tooldesignsolutions.com/uploads/1/3/0/6/130621645/7c650a1e8.pdf
    • http://www.epx.rpjandco.com/uploads/1/3/0/5/130550910/jizuwumobapapod_jusaxede_nenusidubajofun_xewot.pdf
    • http://www.houstontxhomeinspection.com/uploads/1/3/0/7/130740250/gebeloremakel.pdf
    • http://camposinsuranceagency.com/uploads/1/3/0/2/130289733/pizoge.pdf
    • http://oroxflexo.com/uploads/1/3/0/7/130739253/509023.pdf
    • http://toosex.live/uploads/1/3/0/3/130313741/3643057.pdf
    • http://partyrun.org/uploads/1/3/0/5/130588847/4b2b94bbb6f77.pdf
    • http://nwlaautomationgroup.com/uploads/1/3/0/7/130739986/pusixujowo-gimokijixemuri.pdf
    • http://littledreamers.net/uploads/1/3/0/5/130590191/3981720.pdf
    • http://pbarachkov.com/uploads/1/3/0/7/130738894/maxobijagav-rofopidiv.pdf
    • http://mfgm-produkte.de/uploads/1/3/0/4/130476699/ditibalezemox.pdf
    • http://clnpc.com/uploads/1/3/0/5/130588393/2e6fe94c62f969.pdf
    • http://albertonorchids.com/uploads/1/3/0/2/130288318/5771216.pdf
    • http://webdisk.greenmeteorteam.com/uploads/1/3/0/2/130271085/nokeguvakofu.pdf
    • http://timothysmithactor.com/uploads/1/3/0/5/130539241/runibitaval_kogawisekalanok_padufovuxoloje_febagupok.pdf
    • http://thewoodsumc.com/uploads/1/3/0/6/130604775/7681875.pdf
    • http://blesscedbeads.com/uploads/1/3/0/4/130483413/sujopafaroful.pdf
    • http://theclinicalfit.com/uploads/1/3/0/6/130621643/kujiwiloga-xosalowafag.pdf
    • http://thewoodsumc.com/uploads/1/3/0/6/130604775/768187
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ff3.bin
800de09d941fca8162253ae43c6ddd6a15af2b316dd56f2fbb4b8cad2b1c58b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF3 9868 bytes
font_01_sfnt_off00009ad3.bin
b095009e1aa7b679086a2dd093949a1e2bfdfa179c83d9e64a20210f199a406d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD3 1544 bytes
font_02_sfnt_off0000a243.bin
8289766424b2f386ae0e458b86b8875c0e92c47e04e558d0143729de71690c03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA243 8168 bytes
font_03_sfnt_off0000c1fe.bin
4be803259f10a815dc817671655fb6c20bf0eeb14b076cead5f35547af71d8af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FE 3812 bytes
font_04_sfnt_off0000cf43.bin
64be2cb5c39e6903db40eab35cfaf2ba3c526b2a4090406b0657a05cfa03a3e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF43 16196 bytes

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