Malicious PDF — malware analysis report

Static analysis result for SHA-256 547c5acb6749cdd3…

MALICIOUS

PDF

57.3 KB Created: 2020-09-18 19:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19a9071b371926ea418f3ebe84d63d29 SHA-1: ad98b9efe2d36d614a4dc80ae57d7e2143439d7e SHA-256: 547c5acb6749cdd36fc05eb433aa1cdda7b9d0caa0c09f92ce917d19a7119ec8
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to redirector domains and link farms, indicating a malicious intent to drive traffic to potentially harmful sites. The primary lure appears to be a 'game dragon war mod apk' download, suggesting a social engineering tactic to entice users to click the malicious links. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://ttraff.club/wix?keyword=game+dragon+war+mod+apk
    • http://files.envchemgroup.com/uploads/1/3/0/8/130874012/vugosipejofe.pdf
    • http://xepafe.tankingsresources.net/uploads/1/3/2/6/132695924/502894.pdf
    • http://files.rollingglenranchmt.com/uploads/1/3/1/3/131380788/7936041.pdf
    • http://files.100youthwhocarecentralyorkregion.com/uploads/1/3/2/6/132681295/nebuvopetelisajofiz.pdf
    • http://files.blonde-intelligence.com/uploads/1/3/0/7/130775727/jupugedikitiri.pdf
    • http://xafiporej.369k.org/uploads/1/3/1/4/131483281/cc6a99332a.pdf
    • http://files.stoppatriarchy.org/uploads/1/3/2/8/132814097/91ca68cfb8.pdf
    • http://nevaxetoz.nkhrrescuefund.org/uploads/1/3/0/8/130814179/wesiwabexipub-xefix.pdf
    • http://files.goldnguntraders.net/uploads/1/3/2/8/132814476/tenidadikezesobo.pdf
    • https://b82ce8e7-cea8-40bc-97ab-3bf88e35d86b.filesusr.com/ugd/0af078_2067d8f125944e84974a7d3a139457fa.pdf?index=true
    • https://2fc87cf7-8801-48e3-9375-c3e67c43d970.filesusr.com/ugd/8da65f_2adf56168ce9481fab5d52e7de8e6b4f.pdf?index=true
    • https://78693fbc-3ce8-4f73-abce-87b6ff25543d.filesusr.com/ugd/4dded2_e56049a512c74a06885271359199b250.pdf?index=true
    • https://e52e60e8-ee2c-4a79-9de6-2113de9e83ba.filesusr.com/ugd/fafc38_841cbab80a8a4264bb6d18ae8060cbfb.pdf?index=true
    • https://d19a0360-8165-4e73-b3ea-84622a8a98fe.filesusr.com/ugd/0aab01_f5effd8fc59c4e9f93cb013cc9fb144f.pdf?index=true
    • https://0f959f0c-3f24-423a-a216-bd576ac22ba8.filesusr.com/ugd/48bf55_79855a77fdf04a4eb6494db1394cdaf3.pdf?index=true
    • https://c500bea2-6a1e-4239-a040-d343d822f997.filesusr.com/ugd/10b11f_5cde1c9a20fb457ea95ea45a24e94fdd.pdf?index=true
    • https://3e4a49d5-96a8-4ee3-978a-ac442e1dce65.filesusr.com/ugd/c0fca2_b7a9850597f742cabe273fd986b90314.pdf?index=true
    • https://48d774ee-53df-4aee-ab5b-dadf0750e2b1.filesusr.com/ugd/3826db_077812fd016b4b2a852774ac2f12b9cb.pdf?index=true
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007607.bin
cf0ffc8623938b28e46655452c789de5e879abf8fdcfcac131894526e177119b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7607 5256 bytes
font_01_sfnt_off000087e5.bin
b7e5f4066b2a6687d9a029ac6c09d4780f2707fd342383c13664b400f00fd208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E5 6060 bytes
font_02_sfnt_off00009d48.bin
a3d2b3ad9f4aa7754a9c5bc56ad76b291842b55a111217f11019529f80182f19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D48 10480 bytes
font_03_sfnt_off0000c17f.bin
efbb8f6954683c1d17b87cf5fb06916d0b30a2676167bd8daa6bbc201533f53b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC17F 16244 bytes

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