Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c37c849f0b1cc98…

MALICIOUS

PDF

40.3 KB Created: 2020-04-02 01:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 86d970406502e82f1d485d9f800bcef9 SHA-1: ce600da5e0467acad64098a622644ded45d17ac1 SHA-256: 7c37c849f0b1cc985e45f13ef7f61f72b057d149da26549224c175953f0c5dbc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a link farm, embedding a large number of external URLs. The primary heuristic indicates a mass external PDF link farm, suggesting the document's purpose is to direct users to a variety of potentially malicious or deceptive websites. No scripts were extracted from this sample, but the sheer volume of outbound links is a strong indicator of malicious intent.

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://cici-romero-paparazzionline.com/uploads/1/3/0/7/130738822/130738822.html#palabras+que+empiezen+con+gui+gue
    • http://adventuresinedtech.com/uploads/1/3/0/4/130483279/getanefijarusojibap.pdf
    • http://caringhandsmedicalservice.com/uploads/1/3/0/6/130639310/8276012.pdf
    • http://johnsartinmedia.com/uploads/1/3/0/5/130550770/lalofad.pdf
    • http://shopasuwish.net/uploads/1/3/0/5/130542965/1053779.pdf
    • http://alphaomicronpirhodes.com/uploads/1/3/0/3/130323126/retob_gokutofoji_nanotedeb.pdf
    • http://trugraves.com/uploads/1/3/0/6/130639256/wizovigizabi.pdf
    • http://eatsperformance.com/uploads/1/3/0/8/130814843/rirawadesa.pdf
    • http://concretecontractorsmarketing.com/uploads/1/3/0/8/130874043/6927565.pdf
    • http://numerologywisdom.com/uploads/1/3/1/4/131438641/mejanoga.pdf
    • http://inspiroihu.com/uploads/1/3/0/7/130739876/muputo.pdf
    • http://fightingplastic.com/uploads/1/3/1/1/131164129/nusemowigasos.pdf
    • http://pancakesetpolochons.com/uploads/1/3/0/8/130874594/rugexopuzuzif.pdf
    • http://inzombia.org/uploads/1/3/0/5/130539933/kogabet.pdf
    • http://utahgutterpros.com/uploads/1/3/0/2/130270796/xedejanugumo.pdf
    • http://iwit-ism.com/uploads/1/3/0/6/130604061/rizapapomosu.pdf
    • http://elitemeetingsandincentives.com/uploads/1/3/0/5/130547405/4f4154d9698cb.pdf
    • http://learnadjustgrow.com/uploads/1/3/0/2/130272336/25f248e46fb135.pdf
    • http://dentistofbrandon.com/uploads/1/3/0/9/130969834/bodixanefa_lalirokalevoku.pdf
    • http://inspiringwordsmiths.com/uploads/1/3/1/3/131379716/9420cfb217cd409.pdf
    • http://personalitteartevisual.com/uploads/1/3/0/4/130435988/bamulexuda_jukajisitesogur.pdf
    • http://fsrental.com/uploads/1/3/0/4/130483109/6beb8cd7acf1f.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_off000072ed.bin
ff26144d45ac8b1cdf2143b5af6d7e9645a90cc9db4fbefbb221bbfe0ae83d84
pdf-font-stream PDF embedded font (sfnt) at offset 0x72ED 9620 bytes