Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f272fcfefcb26d…

MALICIOUS

PDF

40.3 KB Created: 2020-04-09 00:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: ca190d1871b07cb25925db9cea59ad6a SHA-1: 0891a1dfb35edbdacfaf1868a574cc1fac7292a2 SHA-256: 77f272fcfefcb26d37ad08a1e75e013859fb16d54972ab2d579d74bf154024ef
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic. The primary link points to 'http://fulanisbeautybar.com/uploads/1/3/0/4/130476732/130476732.html#verbos+transitivos+ejemplos', which is likely part of a link farm designed to redirect users to malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

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://fulanisbeautybar.com/uploads/1/3/0/4/130476732/130476732.html#verbos+transitivos+ejemplos PDF link annotation
    • http://gothic-flicks.com/uploads/1/3/0/2/130288551/b26cbf21f0b7ebe.pdfIn PDF document text
    • http://deliverhrllc.com/uploads/1/3/0/4/130476130/vodefenukiviwa.pdfIn PDF document text
    • http://lacontagroup.com/uploads/1/3/0/3/130313213/4460009.pdfIn PDF document text
    • http://dreamdestinationtravels.net/uploads/1/3/0/6/130621033/26f2c7046da.pdfIn PDF document text
    • http://intradosconstruction.com/uploads/1/3/1/3/131398444/jejufoduwamofem.pdfIn PDF document text
    • http://iappsmusic.com/uploads/1/3/1/4/131409709/wiwagapuzaveneponu.pdfIn PDF document text
    • http://chiefleadsofficer.com/uploads/1/3/0/5/130541733/nasonog.pdfIn PDF document text
    • http://itsasnuggles.com/uploads/1/3/0/6/130622022/piluvipabubu-napomenepari.pdfIn PDF document text
    • http://smart-k9.com/uploads/1/3/0/2/130287878/pudorapemamafo_kubodagunofaw_sojodeniza.pdfIn PDF document text
    • http://lindseymichalowski.com/uploads/1/3/0/4/130476740/8af40b.pdfIn PDF document text
    • http://kiyonaga-gym.work/uploads/1/3/0/2/130289441/72777c75f5.pdfIn PDF document text
    • http://sellsugarhouse.com/uploads/1/3/0/4/130488847/lumejevi-rovosupuze.pdfIn PDF document text
    • http://coachingcatalyst.net/uploads/1/3/1/1/131163859/4340172.pdfIn PDF document text
    • http://hutterhouse.org/uploads/1/3/0/2/130289732/3981649.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
🗂 Part of campaign: gothic-flicks.com 3 samples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C5 8816 bytes
SHA-256: 07e0e7a630b54438609af94913708f8479ebabeb45e079e0302f3c31d0a421ce