Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee0f66be6433cd8…

MALICIOUS

PDF

46.5 KB Created: 2020-03-30 07:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 90e6eb7dccbadddc556eeb81a501e43e SHA-1: f20ec1cd022d0559bee6fe7265b411a47e67f753 SHA-256: 7ee0f66be6433cd8237ffb9971afd9390dc625e2d13ae6cd90984a88714fc6de
136 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files. This behavior is indicative of a link farm or a method to distribute malicious content indirectly. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack pattern involves directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://offer.woodsongherbs.com/uploads/1/3/0/2/130272390/130272390.html#significado+de+la+frase+literalmente+hablando PDF link annotation
    • http://harvardgirlgoesrogue.com/uploads/1/3/0/3/130323952/kisugekumo_rumisetula_vapodute.pdfIn PDF document text
    • http://islandtutoring.org/uploads/1/3/0/5/130550708/328d49062a9f110.pdfIn PDF document text
    • http://mrbearskitchen.com/uploads/1/3/0/7/130775027/bujopuxexo.pdfIn PDF document text
    • http://theadventure.company/uploads/1/3/0/6/130639445/bawak_furugaper_kotakof_lanupetifi.pdfIn PDF document text
    • http://colleenbardelli.org/uploads/1/3/1/4/131410094/juvepojekadonevo.pdfIn PDF document text
    • http://anotherangleonparenting.com/uploads/1/3/0/7/130739158/327380.pdfIn PDF document text
    • http://magicalmomentsbymichael.com/uploads/1/3/1/1/131164159/7497994.pdfIn PDF document text
    • http://purplegirlclothing.com/uploads/1/3/0/7/130740257/9234718.pdfIn PDF document text
    • http://perfect-task.com/uploads/1/3/0/4/130476499/e74114.pdfIn PDF document text
    • http://811x.org/uploads/1/3/0/4/130488172/3707382.pdfIn PDF document text
    • http://dollarstopparty.com/uploads/1/3/0/6/130604752/b33c26b8b8afd.pdfIn PDF document text
    • http://anphotography.ca/uploads/1/3/0/5/130589182/vexefuxavi.pdfIn PDF document text
    • http://adcserv.com/uploads/1/3/0/7/130776415/totixur-fexosinemuragom-zuzimekizosenob.pdfIn PDF document text
    • http://themonster.online/uploads/1/3/0/6/130604361/1314862.pdfIn PDF document text
    • http://davidimlahbarrister.com/uploads/1/3/0/4/130435600/ruvorelaxenesew.pdfIn PDF document text
    • http://consultoriaconsciente.com/uploads/1/3/0/7/130776405/3364098.pdfIn PDF document text
    • http://thecoolestpeopleweknow.com/uploads/1/3/0/7/130776672/vijuso-vupagixikojog-podobirise-tizafitosolelu.pdfIn PDF document text
    • http://cnstrategies.net/uploads/1/3/0/6/130621077/77d3a29fc53d6f1.pdfIn PDF document text
    • http://www.cubcountry.org/uploads/1/3/0/2/130272390/sofojub.pdfIn PDF document text
    • http://johndominguez.art/uploads/1/3/0/5/130588546/kenomanasirixowewape.pdfIn PDF document text
    • http://gatewayhomeinspectionsofnc.com/uploads/1/3/0/4/130476798/9872741.pdfIn PDF document text
    • http://obccbd.com/uploads/1/3/0/4/130477394/80f2d656f108af.pdfIn PDF document text
    • http://landscapesuppliesandconstruction.com/uploads/1/3/0/9/130969146/1148361.pdfIn PDF document text
    • http://mexusconsulting.com/uploads/1/3/0/6/130639021/xodadidejez.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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D08 8840 bytes
SHA-256: 0d2599c0f6c5d904844dc491fa6d1bf0653fc35e3d2a0f602f2e259ac6047a5c
font_01_sfnt_off00009cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAE 4144 bytes
SHA-256: 885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da