Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4b6092ea224fb3…

MALICIOUS

PDF

84.2 KB Created: 2021-01-09 17:34:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0844dfec83f66798ce7acb74ee062acb SHA-1: 9995b2d7daae011b6999188c16fce4110faded6c SHA-256: 5c4b6092ea224fb3b744760f76271c32e72f8da4ccb96787d13a137eaaaa6615
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. The presence of a callback lure heuristic indicates a potential phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and extensive external links are indicative of malicious intent, possibly to redirect users to malicious sites or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://traffking.ru/aws?utm_term=marvel+future+fight+emma+frost+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405409/normal_5fc203047f750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413375/normal_5f9d6a4536bba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488335/normal_5fcb3bd0cbc54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_5fd2797884fce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387808/normal_5fdb154515908.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455375/normal_5fee759d042c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5fa2da74e75eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486045/normal_5fc5f05b476b5.pdfIn PDF document text
    • https://wazaxilam.weebly.com/uploads/1/3/4/7/134726650/fuxud.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/UjhfjfS/uber_fleet_app_for_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5fd60df3cdbf2.pdfIn PDF document text
    • https://kuxijixa.weebly.com/uploads/1/3/4/8/134856984/5940267.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b3b503-ac86-4618-a33b-2a96069cde80/xirisulunupibuwavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/682461c3-1313-40b4-a145-5226bae9d9ab/words_with_the_root_super.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/chartered_accountant_certificate_format_word.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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15A 5388 bytes
SHA-256: bb1d6f7909d5d88c7ad92298a69438a1a228a2fb57f3cfe52a044e4dc321f755
font_01_sfnt_off0000f38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38A 7888 bytes
SHA-256: c5a88d04f83a9ec45fe0612cf44b65686f6a58011b94caa0cd8d6ffa20270b16
font_02_sfnt_off000108ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EA 10948 bytes
SHA-256: 4fd9a1a53b828addc11b04a335a9e60937d004736b311f285ec25e350e9c0829
font_03_sfnt_off00012e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E84 16088 bytes
SHA-256: 482b7b4fee51162e6a5d82ff10b0db2f6da6482a74a1be5a66137bb6d850bf40

Open this report in the interactive analyzer, or submit your own file for analysis.