Malicious PDF — malware analysis report

Static analysis result for SHA-256 0418ba1e2597902a…

MALICIOUS

PDF

47.9 KB Created: 2020-03-30 02:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 10b91c47564405d58c7d92223f10a106 SHA-1: 499516b7da2aee9bcff3bd75ba8a65dcd0669afc SHA-256: 0418ba1e2597902aa1ad15f58df74463cfd8ab6a0a60e072c1124de178217695
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, a common tactic for phishing or redirecting users to malicious sites. The document body, though partially obfuscated, suggests a lure related to unit conversion, which is likely a pretext to encourage link clicks. The ML classifier strongly indicates maliciousness, and the presence of a large number of external links points towards a link farm or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://74-123-76-48.mgwnet.com/uploads/1/3/0/8/130813784/130813784.html#convertir+1+metro+a+dam
    • http://lambertfarmslogisticspark.com/uploads/1/3/0/6/130605133/vudenejagasivo-wupevipoweg-rifikitevomusur.pdf
    • http://coolgruel.com/uploads/1/3/1/0/131071240/ripekojuzife.pdf
    • http://bisoninvestmentconsulting.ca/uploads/1/3/0/6/130605198/palipuxilez.pdf
    • http://shelbyhearts.com/uploads/1/3/1/1/131163564/pekaf_wisuxumoti.pdf
    • http://newsherwood.net/uploads/1/3/0/4/130483625/setetigorinanag_kasiti_kijuzuwa.pdf
    • http://domaingregoryconstructioninc.org/uploads/1/3/0/6/130604770/9234690.pdf
    • http://calpremierroofing.com/uploads/1/3/0/7/130776682/1439192.pdf
    • http://emptynesteragent.com/uploads/1/3/0/8/130813496/boxawesoguju.pdf
    • http://blackfilmcentre.org/uploads/1/3/1/3/131379324/d876ceea.pdf
    • http://surgicalregistry.com/uploads/1/3/0/6/130639879/pevanisipubovul.pdf
    • http://geoffwehmeyer.com/uploads/1/3/0/5/130550968/raveriwerozanizijiz.pdf
    • http://gvolifestyles.com/uploads/1/3/0/7/130739043/9975231.pdf
    • http://raimestyleblog.com/uploads/1/3/0/7/130775276/1142371.pdf
    • http://thepathwaytohighergrades.com/uploads/1/3/0/7/130776399/kajolibasaku.pdf
    • http://rearview.services/uploads/1/3/0/9/130968935/a543f0f9a9.pdf
    • http://mta-sts.mail.amandalewispilates.com/uploads/1/3/0/4/130476322/binozonalix_waponomar.pdf
    • http://neoana.com/uploads/1/3/0/4/130435531/2191438.pdf
    • http://ashleygattis.com/uploads/1/3/0/6/130604984/738270.pdf
    • http://nievex.com/uploads/1/3/0/3/130323596/sijamavude-manujeforaj-welefijawijetex-wolevogalapo.pdf
    • http://andysocialexperiment.com/uploads/1/3/0/4/130476370/losotepene.pdf
    • http://bergencabinets.com/uploads/1/3/0/6/130639652/7414786.pdf
    • http://adam-suarez.com/uploads/1/3/0/6/130604765/3747646.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000784b.bin
59f9f544c9f6d26f7e0b9db603c63fd3dd9aa9a013fde86884f82d400cd719c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784B 9832 bytes
font_01_sfnt_off00009b98.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B98 16036 bytes

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