Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d69c9b3ed8fc56…

MALICIOUS

PDF

41.6 KB Created: 2020-03-29 08:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 28f94a1f3ae06e0e61d94d27b71eddcd SHA-1: c74176d535082b8172dbbe151f5fcbe0b1db7b56 SHA-256: 04d69c9b3ed8fc563d6a769d36d0a033e917bfdd77690e38dbe083479f07d40c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, indicating a potential link farm or a method to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. The embedded document body text, while partially corrupted, contains a URL that is also present in the list of extracted URLs.

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://misssoutheastpageantry.us/uploads/1/3/0/7/130740364/130740364.html#que+es+la+miosina+y+su+funcion
    • http://tacticalti.com/uploads/1/3/0/7/130738738/e09b4.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/7/130739596/4705324.pdf
    • http://cyber1risk.com/uploads/1/3/0/2/130274076/997191b7b.pdf
    • http://kepesidoutazas.hu/uploads/1/3/0/5/130590608/bitiraguduxolo.pdf
    • http://activhealthadmin.com/uploads/1/3/0/5/130588498/83cbc613ce6a.pdf
    • http://baddiebrandz.com/uploads/1/3/1/3/131383602/bawup_tujozexididat.pdf
    • http://tragedyovertime.com/uploads/1/3/0/2/130272577/2945071.pdf
    • http://thesoftearth.com/uploads/1/3/0/8/130873989/dobaxol.pdf
    • http://autodiscover.kidschanceofmi.org/uploads/1/3/0/2/130272275/kixafuzuxure.pdf
    • http://celldoctors.org/uploads/1/3/0/6/130639343/domezed-xafesidubor-lufafagale.pdf
    • http://bostonroundtable.net/uploads/1/3/0/5/130588676/201063cbc48d2.pdf
    • http://healthysnackschicago.com/uploads/1/3/0/3/130324234/1674877.pdf
    • http://hostmaster.bemmaccommodation.com.au/uploads/1/3/0/8/130874529/9072145.pdf
    • http://globalstreetartists.com/uploads/1/3/0/5/130550794/8131958.pdf
    • http://autodiscover.organizingwithemily.com/uploads/1/3/0/7/130775830/ridivoxonum_talixos.pdf
    • http://discoveridyllwild.com/uploads/1/3/0/5/130589100/fadupifevibawuma.pdf
    • http://thekashempire.com/uploads/1/3/0/7/130739833/ruzowukefepizojom.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_off0000780c.bin
27ea9ec8bb6a29fabda35b9e8b9b9242b48eb7256804fcff9790ef9c8d932f5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780C 9268 bytes

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