Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eee48b998102979…

MALICIOUS

PDF

38.8 KB Created: 2020-03-09 03:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d058056ffed93d19896ab91a4596543f SHA-1: d6f6c102dd94da78f603b112dd5641db52b79e03 SHA-256: 2eee48b9981029796e70631c5d6eb9ecf4bdee9ddb340c4885e2bca83d366423
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, forming a link farm designed to manipulate search engine results. The primary URL points to a product listing for a coffee machine, likely a lure to disguise the malicious intent. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the SEO link farm behavior.

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://twincitysanta.com/uploads/1/3/1/0/131071180/131071180.html#delonghi+nescafe+dolce+gusto+machine
    • http://earthangelart.net/uploads/1/3/0/6/130639100/liluxu.pdf
    • http://www.terrazzosampleservice.com/uploads/1/3/0/6/130639854/xefadonegevo.pdf
    • http://ivcbrighton.com/uploads/1/3/0/4/130476733/1159306.pdf
    • http://kristofpoelmans.be/uploads/1/3/0/6/130604945/nezikazegavema.pdf
    • http://omnibeachlife.net/uploads/1/3/0/3/130313253/e1bf18.pdf
    • http://heavenlycitizenship.com/uploads/1/3/0/3/130323705/wosunujafalunapif.pdf
    • http://chippedplatecatering.com/uploads/1/3/0/7/130738667/larufedamemebevidig.pdf
    • http://realfamilycamping.com/uploads/1/3/0/5/130589191/rurobusuzotuzarel.pdf
    • http://moco-bay.com/uploads/1/3/0/5/130590375/4069597.pdf
    • http://www.andresara.com/uploads/1/3/0/4/130476452/xoxixizugifag-fosajojukev.pdf
    • http://oakdellfarm.com/uploads/1/3/0/5/130551351/dixepug.pdf
    • http://www.oliviapeasleyricg350.com/uploads/1/3/0/9/130969274/roxeg_xivom.pdf
    • http://www.doublebubblewash.com/uploads/1/3/0/6/130605315/xawalisanade-tuzejos-vosejupiditogol.pdf
    • http://rigzroofing.com/uploads/1/3/0/5/130590310/6500729.pdf
    • http://firstwavect.com/uploads/1/3/0/8/130813646/kavibuxivuzijul.pdf
    • http://trainingbulls.com/uploads/1/3/0/7/130738731/b1db9003656aa5.pdf
    • http://southwestsciencewriters.org/uploads/1/3/0/9/130969179/5355610.pdf
    • http://www.thecoolclear.com/uploads/1/3/0/2/130272240/namerimosaruma.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e24.bin
37e1a78ce474c7562a95b8ba5657c239fc8f9ae79e4cf6c1cfd329df95a78035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E24 8288 bytes

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