Malicious PDF — malware analysis report

Static analysis result for SHA-256 8019b8455d7f1bad…

MALICIOUS

PDF

87.5 KB Created: 2021-06-30 23:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 18a80bdfd3f885c0bdb5dcda07988407 SHA-1: 9ef2d8b31d3c79e7cb0c873767d676dd69585b14 SHA-256: 8019b8455d7f1bad3f2801f2ff0a751da5f7158408a0b1e2230d9bf270dbf83f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by multiple heuristics and a machine learning classifier, including ClamAV detection for Pdf.Phishing.Trojan. The document contains numerous links, many hosted on compromised CMS platforms, which are likely intended to lead users to download further malicious content. The presence of link farms and the overall structure suggest a phishing or scam attempt to trick users into downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9aeca635bb---41423368755.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/10706e714ed75b1d2ed7610c05dede38/71570096753.pdf
    • http://fszhenjia.com/upfolder/e/files/20210605153732.pdf
    • http://akkoryazilim.com/userfiles/file/sixebed.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d275553cc0---fijubutapexulewewaliwud.pdf
    • https://sedefartphotography.com/resimler/files/43534911989.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3c0b6036041b6a9623da631aefa15d01/risepikep.pdf
    • https://delcinfo.ru/img/files/files/kafadonolisaluzidog.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05556d1308---fiwiwufakubusamabaf.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/5abd245fcc564f406956e471eddec06c/zabuwosidogogatufe.pdf
    • http://alhouti.com/userfiles/file/2101819957.pdf
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/kefad.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c803c76dcb---31755582809.pdf
    • http://aftckwt.com/uploads/file/mowasukikumupuramafudebu.pdf
    • http://10glazsikeyrosa.ru/file/43339870742.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d758ce111---30663940586.pdf
    • http://iltorg.ru/upload/file/mukatavurixezejotewe.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/t0dnugnp5856qg020kaptbbpkt/revisivefuvizofividus.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/63qadubiihj38i4bk06l5jp8mg/zazupifuwugegaritunozej.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080271e9fc24---pazupesojulumodazomaku.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/3f0fe96f82be233bf797c5705fd13292/sapowal.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97485204f1---73218042409.pdf
    • http://bioident.pl/photos_fck/file/23986940499.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9834c303c---jutumokigepulugodok.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=download+zuma+deluxe+full+version+for+free+no+trial
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f142.bin
d621eacb7851aa0b34e1d914fea871d557caebd233f223c076ae7cee1c7a5959
pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 10932 bytes
font_01_sfnt_off00010ab0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB0 16792 bytes
font_02_sfnt_off000122c2.bin
1093a337f01382ac0f7bd2ec60d565adca1c8df723a5469821f080f812f124f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x122C2 17428 bytes