Malicious PDF — malware analysis report

Static analysis result for SHA-256 1847f618bec0398b…

MALICIOUS

PDF

97.4 KB Created: 2020-12-14 16:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b6195e935bbeef59c2380cf7659873e SHA-1: 47a4a943ce518d679e237c10aa3450d82ed2035a SHA-256: 1847f618bec0398b2378b584e35fc40f1f917caf643b3d3cce4805f781b171d5
222 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, and it contains critical heuristic firings indicating it links to known malicious redirector infrastructure and a large external PDF link farm. The embedded URLs suggest a phishing or content-luring attack, aiming to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/123?utm_term=lowrey%2527s+microwave+pork+rinds+nz
    • https://robivitoj.weebly.com/uploads/1/3/4/3/134334713/saxuvarawogiro.pdf
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f8b5c308c20a.pdf
    • https://manomukujoputu.weebly.com/uploads/1/3/4/5/134517900/gekaponevadasow.pdf
    • https://tofojuduvebexaj.weebly.com/uploads/1/3/4/6/134650498/vuzafuraj_busidiziwiwa_keriwimukewikaj_mutovinetuv.pdf
    • https://vijarupofelufe.weebly.com/uploads/1/3/4/8/134881143/wadefi_denuvijeduk_nifemed_suxod.pdf
    • https://cdn-cms.f-static.net/uploads/4502245/normal_5fbd76ee999a4.pdf
    • https://gumelajijepepa.weebly.com/uploads/1/3/4/6/134639918/joxivi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc3963c12facd59cebdd614/t/5fc59a0708845d09244ba97f/1606785544896/nifebupawolaloredijazam.pdf
    • https://s3.amazonaws.com/jupudizadid/diridadumeka.pdf
    • https://static1.squarespace.com/static/5fc1818340f1034a5cad2bd6/t/5fd061de5efba8153b22bbcc/1607492063297/bubble_bobble_4_friends_physical_release.pdf
    • https://static1.squarespace.com/static/5fc5195eabaecd33183d5d49/t/5fcb9a1711c29807e6dc2c13/1607178776490/sagitatudaniritojoxolito.pdf
    • https://static1.squarespace.com/static/5fc5c50e1c8c741314534cd3/t/5fc8f3c622891c6875c97a45/1607005126589/zgirls_2_mod_apk_unlimited_diamonds.pdf
    • https://s3.amazonaws.com/suzujewa/76394934962.pdf
    • https://static1.squarespace.com/static/5fc0078111f6a4198480da42/t/5fc27764a97599144e471e4a/1606580068948/kizago.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf56aa9ee0f32b874ac5ab/1606375082433/topsy_turvy_pokemon_smogon.pdf
    • https://static1.squarespace.com/static/5fc1a00dd49dd124473946a2/t/5fce8b2516b71a05c060fdf4/1607371561912/vexilar_fish_finder_amazon.pdf
    • https://static1.squarespace.com/static/5fc52e78bda9c57a97da122f/t/5fcd15ce5177ea328cc81aaf/1607275982714/pioneer_mixtrax_app_android.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1f4.bin
286cc339e5ba8cc35bd3cf4e4b5b4bcd333576aab169c9db8e6484e9c18a7a79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F4 35608 bytes
font_01_sfnt_off00014013.bin
22157519d8c3e1926b57a27b166953f4142a5782995fc61753a5eeb5721685eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14013 5528 bytes
font_02_sfnt_off000152fd.bin
ce445df819ea6bb26effc902a65eb3f15af05e52329d4b05fcf6ed61c58e4fdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152FD 10872 bytes

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