Malicious PDF — malware analysis report

Static analysis result for SHA-256 c380b42e11919a7c…

MALICIOUS

PDF

63.5 KB Created: 2020-03-29 04:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ea3037774fa51df0caa2b0a0d8f64f0a SHA-1: 5cc966f7ef926ee2878a717ca7c5503100d0eff2 SHA-256: c380b42e11919a7c45d4e7e232607a538e97bcee333cbbc1d9b490c88887641e
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://thehnossaproject.com/uploads/1/3/0/6/130620929/130620929.html#definicion+liquido+extracelular
    • http://mathisonfamilypreschool.com/uploads/1/3/0/6/130639669/vawop-jejelomovip.pdf
    • http://merosound.com/uploads/1/3/0/7/130740056/6469139.pdf
    • http://ssperformancemassage.com/uploads/1/3/0/9/130969212/768f9d00.pdf
    • http://vehicleloanusa.com/uploads/1/3/0/6/130604798/9924628.pdf
    • http://tudorsdown.com/uploads/1/3/0/6/130604902/noromasug-kelizirakap-jugixudopisupu.pdf
    • http://www.mjscoffeehouse.com/uploads/1/3/0/4/130476102/269648.pdf
    • http://mustangremediation.com/uploads/1/3/0/5/130590672/6103784.pdf
    • http://protectyourdestiny.com/uploads/1/3/0/5/130589146/pulej.pdf
    • http://boxinsideabox.com/uploads/1/3/0/8/130814246/a9621dd3762294.pdf
    • http://cpanel.kingofpopz.com/uploads/1/3/0/5/130590672/4874173.pdf
    • http://fractext.com/uploads/1/3/0/6/130620957/6467678.pdf
    • http://banyanparkplaycentre.com/uploads/1/3/0/7/130775049/mapefipi.pdf
    • http://owenbottcher.com/uploads/1/3/0/5/130589346/603973.pdf
    • http://a-aon.com/uploads/1/3/0/8/130874601/c6ea0586.pdf
    • http://kuroshgallery.com/uploads/1/3/0/9/130969408/c33fd8b3.pdf
    • http://skmmglobal.us/uploads/1/3/0/2/130273738/8016857.pdf
    • http://harrowpactproject.com/uploads/1/3/1/3/131381721/5723034.pdf
    • http://www.buckssmokingbbq.com/uploads/1/3/0/5/130590509/8200722.pdf
    • http://corecdinc.com/uploads/1/3/0/9/130969437/222c4.pdf
    • http://www.marianhuberart.com/uploads/1/3/0/6/130639624/e2efd6f2.pdf
    • http://noisecancelling.net/uploads/1/3/0/5/130543029/9111582.pdf
    • http://keepitsimplecurtains.com/uploads/1/3/0/7/130775220/60dac.pdf
    • http://wisculpture.com/uploads/1/3/0/5/130590656/dumagikoparis.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_off0000ae41.bin
bfe2c70727f53076dcd9d114fb0e571444210cf261dc3f9f64fae00e5f4faf5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE41 9572 bytes
font_01_sfnt_off0000d0db.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 2652 bytes
font_02_sfnt_off0000da42.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA42 16036 bytes

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