Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b632ccfc6d09ce7…

MALICIOUS

PDF

46.0 KB Created: 2020-03-31 04:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2f648dce7989dc5c410b7b43d1148eb5 SHA-1: 48017bc0ecabf4e939fb01512a2ee5c770e0ecdb SHA-256: 5b632ccfc6d09ce7c25e8f356e913a6dd0cd6dc49ddeb15595b987e58fbb02a1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a coordinated effort to redirect users or manipulate search engine results. The ML classifier strongly indicated maliciousness, and the presence of numerous URLs supports a malicious intent, likely related to distributing further content or phishing.

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://agpmav.com/uploads/1/3/1/4/131406092/131406092.html#biografia+de+baruch+espinosa
    • http://mydondaland.com/uploads/1/3/1/3/131382373/vezumixubinepoveka.pdf
    • http://corealis-ing.net/uploads/1/3/0/6/130621043/1911247.pdf
    • http://poopremovers.com/uploads/1/3/0/2/130287972/zelafurisoned_jikujiko_kadibujarikatuj_monoladiteriti.pdf
    • http://74-123-75-236.mgwnet.com/uploads/1/3/0/8/130874045/toxobujome.pdf
    • http://kellykampftherapy.com/uploads/1/3/0/6/130604392/0c26dc2.pdf
    • http://pinellasparentsforhealthyschools.com/uploads/1/3/0/5/130551214/256658bb63af668.pdf
    • http://noahsarkessentialsllc.com/uploads/1/3/0/7/130739994/6ebaac4444e07b6.pdf
    • http://spicelifeno.com/uploads/1/3/0/6/130603721/c6dc7.pdf
    • http://basic-economics.com/uploads/1/3/0/3/130323405/80cc9189b5b67a.pdf
    • http://allmylove.info/uploads/1/3/0/7/130740571/fadaweluru.pdf
    • http://georgemasonrw.com/uploads/1/3/0/6/130604499/4965305.pdf
    • http://nadiafarah.com/uploads/1/3/0/5/130551456/5148647.pdf
    • http://travels-diamond92.com/uploads/1/3/0/5/130589444/duzorixonemabe_pabagupevagedim.pdf
    • http://inninginnovations.com/uploads/1/3/1/1/131164136/bugugojowagevi_ruvesisam.pdf
    • http://swanlakecove.com/uploads/1/3/0/4/130435649/1562011.pdf
    • http://lorahakanson.com/uploads/1/3/0/2/130272648/rusekepazosivobag.pdf
    • http://bigbtravel.com/uploads/1/3/0/5/130542860/f02dd6.pdf
    • http://mvhc-llc.com/uploads/1/3/0/3/130323324/gatuwinel_rejek_zesefa_pubotep.pdf
    • http://bradleyrobybowl.com/uploads/1/3/0/7/130776205/buxulafami.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_off000073d5.bin
10e896255e077773901da0659fe89622fbb5e189aa547d90920a965f5c168f41
pdf-font-stream PDF embedded font (sfnt) at offset 0x73D5 8832 bytes
font_01_sfnt_off00009371.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9371 16204 bytes