Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cedb0dd37beea05…

MALICIOUS

PDF

72.3 KB Created: 2020-04-01 14:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6348c196665678efa675159ce6748305 SHA-1: c65501bd2874e72c32890b2c4f2e4f94dda2a818 SHA-256: 1cedb0dd37beea05e7e0df7db27a26551e3b3710a4708c4286ecbd07622b541f
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of external links, indicating a link farm or SEO spamming technique. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests that the document may contain instructions for executing commands, potentially involving Windows scripting tools. The presence of numerous external URLs points towards a delivery mechanism for further malicious content or a redirection scheme.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://mymissblue.com/uploads/1/3/0/3/130379101/130379101.html#cuales+son+las+formas+de+recolectar+datos PDF link annotation
    • http://experiencechristmasnj.org/uploads/1/3/0/7/130740213/82f51cce391b2.pdfIn PDF document text
    • http://wagnertoxicology.com/uploads/1/3/0/6/130603928/papugus_jomafuvoxotudan_minizapiz.pdfIn PDF document text
    • http://wildomarexpresscarwash.com/uploads/1/3/0/3/130324234/5139345.pdfIn PDF document text
    • http://taniajanenaturallycurly.com/uploads/1/3/0/8/130873850/90f435c6af5532b.pdfIn PDF document text
    • http://canadaquestexcursions.com/uploads/1/3/0/9/130969061/4754132.pdfIn PDF document text
    • http://anokacommunitymission.net/uploads/1/3/0/6/130621218/7786543.pdfIn macro / runtime command snippet
    • http://yihfaonline.com/uploads/1/3/0/4/130483634/313605ee3aaa.pdfIn PDF document text
    • http://719313071535310116.com/uploads/1/3/1/3/131380265/likopemawu.pdfIn PDF document text
    • http://bungalows-semidees.com/uploads/1/3/0/4/130483389/toripo.pdfIn PDF document text
    • http://steveblacksmobile.com/uploads/1/3/0/4/130478760/narokeselebeb-kejatotug.pdfIn PDF document text
    • http://tlokwengretreatgardens.com/uploads/1/3/0/7/130739074/zugik.pdfIn PDF document text
    • http://niravyoga.com/uploads/1/3/0/3/130313193/gigonekefavinawoz.pdfIn PDF document text
    • http://andrebretonracing.com/uploads/1/3/0/7/130776046/ruperupeb.pdfIn PDF document text
    • http://coca-pills-drugs.com/uploads/1/3/1/4/131437940/wibinebinimavu.pdfIn PDF document text
    • http://bookoobooks.org/uploads/1/3/0/5/130590096/6230936.pdfIn PDF document text
    • http://valkyriefineart.com/uploads/1/3/0/6/130603698/411ea743a258a.pdfIn PDF document text
    • http://toouniquedesigns.com/uploads/1/3/0/6/130605089/luganawate.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 8796 bytes
SHA-256: 766d57b4440231f4ff6cfab9201206f47eb1fb849fcce275f44393469e42bf8c