Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c4c4ee309a6848…

MALICIOUS

PDF

41.8 KB Created: 2020-03-21 21:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 235ddef8b36467170ff240b9e2ef9192 SHA-1: 8122579d5fc747154f37214f6732bd591297d4c1 SHA-256: 37c4c4ee309a684849da8614309aaa11121f0e7c135046ef32d4a9f8a8b22bbe
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a link farm, with a significant number of external URLs embedded within its structure. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous links hosted on the dominant domain 'fitnessjourneypt.net'. The document body contains garbled text and what appears to be metadata, but the primary malicious activity is the distribution of these external links.

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://interculturalrefugeelife.net/uploads/1/3/0/6/130604688/130604688.html#poper+yes+pizza+cd+juarez+las+torres
    • http://fitnessjourneypt.net/uploads/1/3/0/2/130288567/bajigob.pdf
    • http://creativelynatty.com.au/uploads/1/3/0/7/130775840/0f81222.pdf
    • http://www.acgemny.com/uploads/1/3/0/4/130435862/5125998.pdf
    • http://snsmedia.org/uploads/1/3/0/2/130273894/fewixozonoriga_pakas.pdf
    • http://www.simplyjesusblog.com/uploads/1/3/0/5/130543065/zifavesizakoxi.pdf
    • http://boat-unlimited.com/uploads/1/3/0/2/130272370/pomigasegina_valixiwitowaga_gudigigubupolu.pdf
    • http://tacticalaviation.com/uploads/1/3/0/5/130590140/8669410.pdf
    • http://mistershaky.com/uploads/1/3/0/7/130739732/d13891d66f52.pdf
    • http://pastorsblog.us/uploads/1/3/0/4/130479570/9261692.pdf
    • http://shannonbrownlpc.com/uploads/1/3/0/7/130739674/virosefew_viweto_petedujufabaruk.pdf
    • http://drinkcomkom.com/uploads/1/3/0/4/130476432/nariganapux-tonekelemu-zetulavurevumon.pdf
    • http://www.jeromestover.com/uploads/1/3/0/3/130379362/sogejamiwozew.pdf
    • http://pitchtreemetalworks.com/uploads/1/3/0/5/130588445/forajivaxu_nutareke_vexepitide.pdf
    • http://friendsofgosw.org/uploads/1/3/0/4/130483956/4085466.pdf
    • http://www.fitsandwiches.com/uploads/1/3/0/2/130289735/8819479.pdf
    • http://safemobility.org/uploads/1/3/0/3/130323888/jovamakagav.pdf
    • http://aylesburynaturalburial.com/uploads/1/3/0/4/130435873/2c3ec003cee89d.pdf
    • http://asesorarteeventos.com/uploads/1/3/0/5/130539231/9ae81e78766.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006df0.bin
21e3c7321016f5fcf63e329bfa33bfd2083fe261d38a3f66c85d683e29768d16
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF0 8888 bytes
font_01_sfnt_off00008e2f.bin
8bdbc4fa0660802d1c4200059c153e98eb919eb40fd02047fcf25abf6a6cd36c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2F 1960 bytes