Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ef9a336a6410f8…

MALICIOUS

PDF

51.5 KB Created: 2020-03-24 06:37:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: c92628698a6caffc0ca78a7b6384c78d SHA-1: 7afe213b9293b102bfc1a33df72765822dd2469d SHA-256: e1ef9a336a6410f84e71110032eefc355782cdcc2ae37a3d3401ae96a0c56933
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 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. This pattern is indicative of a link farm or SEO spam campaign, designed to drive traffic to potentially malicious or deceptive websites. The ML classifier strongly supports the malicious verdict.

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://radiantalchemywellness.com/uploads/1/3/0/4/130476214/130476214.html#spring+boot+interview+questions+for+experienced+javarevisited PDF link annotation
    • http://sheneehoward.com/uploads/1/3/0/7/130775395/jenebu-vijokenona-palinazasa.pdfIn PDF document text
    • http://mykayscreations.com/uploads/1/3/0/2/130272981/1611760.pdfIn PDF document text
    • http://www.craftybeeshomestead.com/uploads/1/3/0/4/130494871/wijetebejare.pdfIn PDF document text
    • http://zziggy.com/uploads/1/3/0/2/130270776/6339090.pdfIn PDF document text
    • http://skypelovers.net/uploads/1/3/0/5/130538953/deb43d56b.pdfIn PDF document text
    • http://hostmaster.fionaspotswood.uk/uploads/1/3/0/7/130740508/1481794.pdfIn PDF document text
    • http://www.ceejayshop.com/uploads/1/3/0/9/130969118/rekevanizi-gofakiseruke-gizagu-tosepibobikaliz.pdfIn PDF document text
    • http://akafashionenterprises.com/uploads/1/3/0/2/130270931/3290a581ed3917.pdfIn PDF document text
    • http://westwoodhillsah.preview.pethealthnetworkpro.com/uploads/1/3/0/4/130435590/9489084.pdfIn PDF document text
    • http://selwyndebtrecovery.co.nz/uploads/1/3/0/8/130813922/9767670.pdfIn PDF document text
    • http://cianarose.com/uploads/1/3/0/7/130775475/gulosovevibok.pdfIn PDF document text
    • http://deadbeatbuddy.com/uploads/1/3/0/5/130540458/vixomasop_xudejulobe_nibemelofimus.pdfIn PDF document text
    • http://mail.mydigitaleyes.com/uploads/1/3/0/4/130488694/5204748.pdfIn PDF document text
    • http://mysignatureboutique.com/uploads/1/3/0/5/130589133/gexasisotibudu.pdfIn PDF document text
    • http://www.clarkesblacksmithforge.co.uk/uploads/1/3/1/0/131070394/repaniviler_levedatapuf_puzup_takisopaxe.pdfIn PDF document text
    • http://ztkarl.com/uploads/1/3/0/4/130488914/2505138.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A54 8260 bytes
SHA-256: b55c7877a15443fdf91952062958ebb709e9c4fd53f72d23b0ec2199ac83918d
font_01_sfnt_off0000aa3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3F 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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