Malicious PDF — malware analysis report

Static analysis result for SHA-256 87275effd295fbe8…

MALICIOUS

PDF

39.7 KB Created: 2020-04-19 12:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b5c30be37edd5025c5b7f5baeddd1ddc SHA-1: 08d78d7deb7d8f46106ebc55782eb1438c0ed1cc SHA-256: 87275effd295fbe80845dcb75bccef272ff09cc605073e4933e15c08878de470
136 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one specifically presented as a leadership book summary. This heuristic, combined with the 'Payment redirection / bank-detail change lure' finding, suggests a phishing or business email compromise attempt. The presence of embedded JavaScript, though not fully detailed, indicates potential for malicious actions such as downloading further payloads or redirecting the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://twinelectronicz.com/uploads/1/3/1/3/131380811/131380811.html#the+contrarian%27+s+guide+to+leadership+summary PDF link annotation
    • http://prestigecoffeeroasting.com/uploads/1/3/0/6/130621587/0e2110.pdfIn PDF document text
    • http://lawhornandassociates.com/uploads/1/3/1/3/131398278/bexufevaxegamib_letovavi.pdfIn PDF document text
    • http://mariamexpopresentation.com/uploads/1/3/1/4/131438012/fapumipugigiwuriru.pdfIn PDF document text
    • http://fpspiritwear.com/uploads/1/3/0/4/130483348/99734b1.pdfIn PDF document text
    • http://id10ttechservices.com/uploads/1/3/0/3/130313513/lawuzosolajazu.pdfIn PDF document text
    • http://pcfunited.com/uploads/1/3/0/4/130483819/nabobuvis.pdfIn PDF document text
    • http://annanwhitney.com/uploads/1/3/0/5/130590700/8888954.pdfIn PDF document text
    • http://ringsking.biz/uploads/1/3/0/7/130738576/8542338.pdfIn PDF document text
    • http://autonomyjeans.com/uploads/1/3/1/6/131636719/jiwenowagedug.pdfIn PDF document text
    • http://bulkano.com/uploads/1/3/1/0/131070926/guxedafivifexov.pdfIn PDF document text
    • http://haulinmedia.com/uploads/1/3/0/4/130488316/soburaxilamexazilazu.pdfIn PDF document text
    • http://proctorsilocleaning.com/uploads/1/3/1/4/131438473/wijazivasawila-raxaje-kakego-panojokedoro.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7299 8384 bytes
SHA-256: c75315ea543696637a029aaef61d2bc4d18050f2a23bd6d364c6bf68ecd002eb