Malicious PDF — malware analysis report

Static analysis result for SHA-256 9339387b4d52f6b2…

MALICIOUS

PDF

43.3 KB Created: 2020-03-20 09:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 19fee7ceb633d511812122bf95a5ee58 SHA-1: 5213750f7463792351a5710e53271b9e885cde90 SHA-256: 9339387b4d52f6b25f2941a5760ad95d8056581c62d6f67e0c74bdbb15e9c9af
94 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF with high confidence. The document body, though partially corrupted, contains text related to a 'Manual de cargador frontal caterpillar 950 gc' and references to the embedded URLs, suggesting a lure to trick users into visiting potentially malicious sites. No scripts were extracted from this sample.

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://sacredsantafe.org/uploads/1/3/0/8/130874180/130874180.html#manual+de+cargador+frontal+caterpillar+950+gc
    • http://handymandanny.com/uploads/1/3/0/6/130620620/9126450.pdf
    • http://1healthsource.net/uploads/1/3/0/6/130605291/5115694.pdf
    • http://soleiltranslation.com/uploads/1/3/0/5/130588286/rarekufole-gawizo-xinamavefa-wonojuluwiruj.pdf
    • http://brianpastor.com/uploads/1/3/0/7/130739431/9843656.pdf
    • http://www.krissyrunstheplanet.com/uploads/1/3/0/2/130289247/guxorononozari.pdf
    • http://fireflyevent.com/uploads/1/3/0/5/130551206/bilivekokeruk-fabebez-bosezekerab-xotebizaporapun.pdf
    • http://mx.beastnerd.com/uploads/1/3/0/5/130543333/wamuwuso.pdf
    • http://4us2wire.com/uploads/1/3/0/9/130969888/zudonexuj.pdf
    • http://davebaskind.com/uploads/1/3/0/3/130379287/838511.pdf
    • http://peacemvmt.com/uploads/1/3/0/8/130874669/tulofewulixe-popilekukuma-nezenuberaz.pdf
    • http://dennisandkaterina.com/uploads/1/3/0/8/130813663/gutot-ratixekebafow.pdf
    • http://leaguepronos.net/uploads/1/3/0/4/130490602/82296156d35145c.pdf
    • http://onelasttreat.org/uploads/1/3/0/6/130639296/xanufirekomat.pdf
    • http://www.gmtatx.com/uploads/1/3/0/5/130540661/3d5efdab76.pdf
    • http://treymoore.net/uploads/1/3/0/6/130639613/4a1af6aaa819.pdf
    • http://ns2.voterabhi.com/uploads/1/3/0/9/130969034/tuzedudofasagep.pdf
    • http://nandaphoto.com/uploads/1/3/0/2/130272462/wugivogozilos_pebanujozok_lizaz.pdf
    • http://tappchicago.com/uploads/1/3/0/7/130739263/jiwipuri-taweziguzudiz.pdf
    • http://huffmandowns.com/uploads/1/3/0/6/130605240/1361abc42.pdf
    • http://goplacesseefaces.com/uploads/1/3/0/8/130874320/8434409.pdf
    • http://laylasnotes.com/uploads/1/3/0/7/130738881/851e6f3.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_off00007e59.bin
dfd9361e18e504c8d1acccfec03d4fc9f41f6ce4b0a092df6d6e60aef2976f0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E59 8504 bytes

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